A game that my mother and I like to play, when just hanging out with a computer near by, is what I call the 'ABC' game.
So, here are the rules:
Taking turns [it doesn't matter how many people you have, unless you have over 26 people. Then you might have a problem.] you go down the alphabet, choosing ether a song that begins with the letter of the alphabet your on or the name of a artist starting with said letter. You can pull up any website that plays music for free, like YouTube or Grooveshark, and easily listen to the songs you choose.
Example:
Say you're on the letter 'A', you can choose ether an artist that begins with that letter, like the All American Rejects, or the name of a song that begins with that letter, like Apologize by One Republic.
'B' could be Billy Joel or Breath by Breaking Benjamen! [See, four 'B's in a row. Am I good, or what?]
Hopefully I explained it well enough! Have a fun time playing it!
Lia