A couple.The other day, I transcribed and learned Good Girls Don't by The Knack. It's a fun song, but other than for my own entertainment and maybe my wife's, I can't think of anywhere else I'd ever play it. Family gatherings? Nah. Church picnic? Unlikely. Class reunion? Maaaaayyyybe, but only because we'd all have listened to it.
So what songs have you learned that aren't likely to be played in front of other people?