Board games and/ or card games might be nice. Risk, Trivial Pursuit, bridge, gin rummy, etc. Also if someone has a home karaoke machine and can bring that, those are popular.

I went to a party a few months ago where we each put something the others didn't know about ourselves into a hat. Then we picked the slips of paper out of it, and each read what the thing was and tried to guess who it was.