After finding your site, one of my best friends and road sister in photobooth-ness and I decided to take a wee tour while she's in LA visiting. We wanted to report that Backstage in Culver City not only has a great working-order photobooth still, but the bar staff is equally wonderful--they posed with us in our two takes!
Also, the photobooth at Tiny's K.O. is still not operable. The owner said it's from 1955 and he's had trouble keeping it going. If anyone can offer him some help, I bet he'd appreciate it. (He seemed rather worn down by it.)
We also took at trip to Lucky Strike Lanes and, while our photos came out not fully developed (lacking contrast) the bouncers were extremely helpful and reported that while it occasionally has some snags, they are rare--one bouncer reported to have posed in it over 300 times!
Just for your archival info! And thanks for the locator!!
Erica