Might be my new favorite cocktail bar in Vegas, and you wouldn't expect it from the typical Vegas hotel lounge first impression. Unique spirits , great mixers, and a super knowledgable staff .

Not your average "Lobby Bar ". Classy , craft cocktails by true mixologists , and a cool spot to people-watch. Always our 1st stop when we bar-hop @ Cosmo . Cheers!

Ask for Roger Gillespie to shake up your drinks. Let him go off the menu with cocktails such as the Cross Stitch with a 12-year rum , whiskey , Benedictine and set on fire at the end.

This is the best cocktail bar on the strip, hands down. Try any of the signature drinks and you will be impressed; this place stacks up against the best craft cocktail bars in NY and SF.

The only place on the strip I've found to get a true quality drink. Extraordinary classic cocktails by true artists , well versed in experimentation and matching your drink to your tastes.

Seems like a sitting area at first since it’s next to the lobby, but I think this is an underrated bar at Cosmopolitan . The cocktail concept is cool, with sets of 1 old and 1 new version of a cocktail

Great drinks. Classic Vegas-style lounge decor and ambience. Wonderful area for people watching !

I don't know about the bartenders being sharp. I asked if they only had London dry gin . "Oh no sir, we also have tanqueray!" I had the last word. Delicious and blended, but I can't vouch for the staff

I know you're thinking... "just another lobby bar "... BUT NOT SO... this is mixology at its BEST! Try something you wouldn't normally gravitate towards... you'll be glad you did. It's all good here!

Voted one of the best bars , make sure to try one of their signature drinks or just ask the bartenders to make you something different. You won't be disappointed if you're into classic cocktails !

The pink one is called The Seger and is not as sweet as it looks. :) The Mayan has got spicy chili powder added that sneaks up on you! Both are excellent choices! Only at the Vesper @The Cosmopolitan .

The Prolgue is a take on a Last Word that incorporates the very piney St George Terroir gin and pine liqueur to great effect. The trees , they are us.

Sip a little bit of history at Vesper Bar , like the Williams Of Orange , named after the Dutch king that introduced Gin to the English.

Josh Balbontin is a great mixologist ! Just tell him what you like and he can elevate it to places that you didn't know existed!

Vesper is stocked with awesome spirits . New Tequila—Oprah's Fav—Casa Dragones, is carried here. It's top dollar, but well worth it, some of the smoothest stuff you'll ever try.

Take your taste buds back in time with classic cocktails from the late 1800s to early 1920s infused with a modern make-over.

You can get free (albeit weak) drinks on the floor that's 20 feet away. However, the people watching at this lobby entrance after 2am makes the $10 drinks totally worth it.

Very nice bar with a lounge atmosphere. Knowledgeable bartender , great service.

Jessica is a world class Mixologist . I just three of the best drinks I've ever had in my life. Worth every pennies.

Unfortunately, though named "Vesper," they actually don't serve a proper Vesper cocktail . They are missing the hundred proof gin and hundred proof vodka to go with the Lillet Blanc. #jamesbond

Many of the signature drinks here incorporate fresh herbs for a surprising and refreshing take on classic cocktails .

A friend turned me on to 'The Mayan,' a great cocktail which isn't on the menu, but well worth asking for.

Stand at the edge of the lounge area and shoot straight through the middle of the video pillars. The presence of the mirrored ceiling will give you a great effect.

They have the best hotel/casino attitude adjustment bar on The Strip! Staff is sharp & bartenders are knowledgeable .

This is a great place to watch people while enjoying a good cocktail .

Best Moscow Mule ! Hands down. It's not served in a copper mug, but it don't matter.

elaborate cocktails ! the one with green tea was delicious

Totally reasonable cocktail prices. Ask for Rodger or try to get him, great honest bartender . He'll take care of you.

Wonderful handcrafted cocktails in a modern hip atmosphere . Try the Mambo Italiano if you're a garlic lover. Read more

This is the only high volume craft cocktail bar in the world that's open 24 hours .

The 12 Year Itch is the way to go...even if you just try an ounce. Fantastic Barrel-Aged cocktail .

Epicurean craft cocktails in the Heart of a Vegas new classic hotel .

Excellent selection of liquors . Great for people watching .

See Chris aka AUSSIE! This is one of the best mixology bars in Vegas. If you're complaining about 20 min to get a drink, then you know nothing about craftmanship. Go to a generic bar to get your shit.

Try any of the mule drinks. The descriptions might be confusing but order one anyway. They are great!

If you love Belgian Beers like we do. Try the Delirium Tremens or Chimay Blue Cap. Both equally delicious.

The Andalucian Maria is incredible!!! Bryant makes an amazing cocktail .

George is a great mixologist ! Get the Moscow Mule for a nice kick of ginger .

Quieter bar in the Cosmo - always the most interesting characters

Just tell them the type of things you like and trust them to make you the best cocktails you've ever had.

Good bar , they know their stuff. Drinks tend to be a little dry.

Definitely order One Night in Bangkok - their take on Ramos Gin Fizz

Get the Mayan - the chocolate covered bourbon & cayenne infused cherry is life changing ~ for a cocktail junkie ;)

Best handmade drinks ever! No mixes here -- everrytjing is from scratch. Try a bloody mary !

Don't be afraid to ask the bartenders for help when trying to select a cocktail !

The staff here are wizards of booze par excellence, some of the finest cocktailians in all the land.

Try the Cosmo ! It's so good. ????

Ask for George. Best bartender / mixologist in Vegas!

Everything is good.

Ok they don't have a "signature" per se but many many great old school cocktails . This is the Moscow Mule . Refreshing!