#1 = Root beer float!
Kinda like brianna's: Any juice- limeade is great mixed with bubbly water. Bubbles cut through humidity and dry mouth.
Gin and tonic
Wheat beer
Beautiful ketel one dirty martini with a floaty sliver of ice.

"Newman's Own" makes a good limeade. And a good "Lemon-aided" Ice Tea, for that matter.