Theatre in general, although i like Theatre Junction which often has good shows on for a good price.
www.theatrejunction.com
Beat Niq Jazz Club is often a cool place for a drink and good adult music, and Murreitta's across the street often also has live music - usually pretty good and not really 'bar scene' type stuff.
http://www.beatniq.com/ http://www.murrietas.ca/
Chocolate Bar (14 St & 17th Ave) or even better Nectar (Inglewood) have good & great (respectively) late dessert options that can be a nice break from the everyday and a chance to chat?
http://www.nectardesserts.com/
You can go for Bubble Tea, like in Chinatown at Peerless Pearl.
Personally though my favorite is a board game or card game with friends (Carcassonne!), but you'd need friends? lol
Summer time opens up more options though. Easier to go for a walk or sit out on a patio on 17th or 4th or Stehen Ave, etc.
Those are all night options, if you need day options too you are just being a bit lazy IMHO. There is TONS to do in the city, not to mention the surrounding area.
I am not sure of any city in the world in which you can subtract all sports, bars, and clubs and still have a ton to do at night?? We don't have Broadway shows but... ?
Claeren.