Shoreline Senior Center has a bingo/karaoke fundraiser each month.
It is very fun/campy, relaxed and all ages (21 and older).
By campy I mean you crumble up your bingo sheet and throw it at the winner each round among other things. And the karaoke is done between games through the evening.
Daubers are available at the check in, they sell food (it was pretty good/inexpensive), beer, wine and pop.
Doors open at 6, play starts at 7.
You reserve seats here: https://seniorservices.ejoinme.org/MyPages/January2013ShorelineLFPKaraokeBingo/tabid/432435/Default.aspx
I've only been once and bought at the door and it was not sold out but I'm not sure how crowded it is every month. I'd suggest getting there by 6:30 if you want to buy at the door.