I bought frozen raspberries the other day to use on pancakes. I had a bunch left over though, already thawed out so I tried putting them in a glass, mushing them up and mixing them with lemonade to make authentic raspberry lemonade. And it was great. A bit lumpy, but the texture just adds interest.
To make it even more interesting, I mixed in some vanilla vodka and now it's fantastic. The best cocktails are made with fresh fruit, not fruit liquers, if you ask me. I'm not sure if they work out cheaper or not though. Berries cost so much. Full of vitamins though, so it's a healthier way to drink booze at least.