Chiltern Firehouse, London

It's the original 1:1:1 cocktail (equal parts gin, vermouth, and Campari), but Chiltern Firehouse in London tweaked the ratio on this bittersweet Italian classic.

It just may be the perfect cocktail—especially when you can make it (and serve it) in bulk.

The elegant Cuban combo of lime and rum has nothing to do with the syrupy slush you'll find at swim-up bars.

This potent New Orleans nightcap is as much about the aromatic absinthe rinse as it is the Cognac and rye.

When in doubt, add soda. The resulting highball (about 2 ounces of any booze filled to the top with soda) is refreshing—and impossible to mess up.

Of this take on a martini, James Bond quipped, "I never have more than one drink before dinner. But I do like that one to be large and very strong and very cold and very well-made." What he said.