I hate it when you walk in the door at someone's place and they say, "Would you like a drink? We've got everything!" Way too open-ended, folks. In that situation I'll generally just grab a beer, because its simple... I'm nearly certain that if I ask for a cosmopolitian, the next question to me will be how I'd like it made, and that's just way too much work for a party that's not my own. Plus, I know that no one actually has everything.