"A hobby is an activity or interest that is undertaken for pleasure or relaxation, often in one's spare time."
Spare time? What's that?
Watching old movies and television shows! Listening to music! Reading! Writing! Arithmetic! Wait, no. Not the last, definitely not the last. But watching (and re-watching) old movies, definitely something I do for pleasure and relaxation. Discovering "new" old movies, and new actors, is so much fun.