The Sri Thep Cineplex on Sri Thep Road, has been operating since the early 70's, though I couldn't get an exact DOB. It has three screens. In the 70's and 80's, however, it had only one screen. The area that has been turned into the two smaller theaters was a nightclub.
The time I spend in the Sri Thep Cineplex reminded me a lot of the old theaters in Philly, my hometown, before they closed down. Lots of unusual characters loafed around, a few of whom bought tickets.
They had three different movies showing, but if less than 5 tickets are sold for any one movie they don't screen it. "It's just not worth the cost of keeping the A/C on and projector running," said one of the staff.
I was the lone ticket buyer for "20th Century Boys," a Japanese sci-fi flick that was released last year. They didn't screen it and I was forced to settle for the Thai ghost-comedy Luang Pi Gap Pi Kanun - slow torture with a few mildly amusing fart gags.
If you should happen to come across a funky old theater like this, doesn't matter what's showing, buy a ticket, support a life.