Let's make it 4 Minnesota posts in a row!
At one apostofest I managed to have both a "key lime martini" and "sex on the beach". Both were delightful, although the names may be a bit misleading. Good recipes for both can easily be found in an internet search.
My favorite though is one I've loved from childhood: A & W Root Beer. Too bad they don't have as many drive-up stands as they did, where you could get a frosted-mug glass that was the perfect antidote to summer heat.