clipped from: ask.metafilter.com   
What are good summer drinks? We don't want anything complicated or high caloric; the point is to keep it very simple and relaxing. I don't want to come home and whir up a pitcher of margaritas or anything.

What summer drinks have the same "pour and enjoy" quality as bourbon in February?

ginger beer and dark rum with lime (called a "dark and stormy")

Pimm's is delicious. It's a drink base containing gin, that's sort of spicy-fruity-bitter, and it's refreshing in the same way as not-too-sweet iced tea.

my favorite summer cocktail: pernod (20%), orange juice (50%) and something bubbly (seltzer, champagne, what have you) (30%) in a tall glass filled with ice

Seconding Pimm's - but with Old Jamaica ginger beer!

the Ellison, courtesy of Blue Owl (terrible website here): Hendrick's gin (and none other), fresh mint, lime juice, simple syrup, a dash of bitters, and one or two very thin slices of cucumber floating in it. Shaken and served like a martini

Southern Comfort with cherry limeade

Vermouth