Teen Angst-Cracker, Teenage Lobotomy or 53rd and 3rd-Ramones. Complete Control or Police and Thieves-Clash. Somebody-Aerosmith. Maybe some Neil Young stuff.
At the moment, it'd be I Will Survive. However, I avoid parties most of the time, and generally prefer not to break it out unless there's an emergency.
I'd rather not, but I used to be able to pull off a half-decent acoustic version of "The Girl from Ipanema" with English lyrics, or just ba-ba-dada ba-ba ba-dada and so on.