Sometimes when I am in a family setting and they ask me to play guitar, we end up playing stump the guitar player. When they ask for songs I have heard but never played, I usually pick an easy guitar key, C, G something like that and then go for it. Having heard them, and probably many times, I can even simulate the parts that people recognize, i.e. "improvise" a solo, that is reminiscent of the original but usually not note for note except for maybe the most famous parts or the beginning lick etc. It is a great test of my musical ability and I actually enjoy, since it is a "safe" place to try it as everyone is having fun and actively trying to stump me. If I can get a verse out or the chorus out they seem satisfied that I am spectacular!

My wife asked if I had seen the dog bowl. I told her I didn't even know he could.