If you like rum, Long Island Iced Tea; Cuba Libre; Dark & Stormy; Mojito.
If you like gin, Martini.
If you like vodka but not gin, Vodka Martini or Cosmpolitan.
If you like whiskey, an Old Fashioned or Manhattan.
Don't be afraid to play between the lines, how about a whiskey Mojito or Cosmopolitan?
"To follow knowledge like a sinking star..." (Tennyson's Ulysses)
Espresso martinis are such a crowd pleaser and easy to make.
I love making French 75s, taste just as good with a decent cava instead of champagne (a Spanish 75 maybe!). It's just gin, lemon juice, sugar syrup and a top up of fizz. Looks snazzy served in flutes.
With gin you could try a Gin Buck, just gin, juice of half a lime and topped up with ginger ale. Really refreshing long drink.