We get groups of people that meet in some of the various dart pubs around here (the Moon and Sixpence Public House comes to mind) that will sit in a corner and play tunes like that. Adds a nice atmosphere.
Whenever I see a bartender I know playing I'll walk up and say "Play Freebird!" which always cracks him up (he can rip on guitar too). The rest usually give that blank stare you get when someone doesn't get the joke. Heh...