I started doing weekly socials, we started with Root Beer Floats...and I can't stop doing them...they LOVE them. I continued with a try a pie social, where we sampeled different kinds of seasonal pies, ice cream sundaes, lemon social, a let them eat cake social, popcorn/home made cotton candy social, anything besides cookies and punch. They seem to like it, and i get a lot of residents to participate. I also try to play up ANY holiday.
I worked at a facility where i came up with a price is right game, including a home made plinko board, a hole in one or two, trivia, I made sure to be rod rodney and just get into it...it was a blast.
The Wii is always fun, however I find that my residents will be more apt to do this if I put it away every once and a while and then bring it back out after a month or so...it seems all new to them.
I like to do trivia scavenger hunts, where the residents have to asnwer different trivia questions placed in different parts of the building, this also helps with new residents to give them a little more fun tour of the building