Even though each bar is different, some cocktails are safe bets, while others often miss the mark. • At nearly any bar, a classic Negroni or martini will be simple to throw together. • Bartenders generally don't enjoy preparing some drinks, like a Long Island or Ramos Gin Fizz. I'm a professional bartender, so I can tell you that the only cocktails that are sure to be good at every bar are simple two-part washes, like a vodka cranberry or a rum and Coke.