I discovered that you can actually see L & G at a cinema in Stockholm, Sweden.
Namely
Bio Rio.
I was there yesterday with a friend and saw it. The 5.1 surround version was broken for some reason, so they only showed the stereo version, for only 50 SEK per ticket. Sound wasn't fabulous, but it was really cool to see this ol' movie at a theater after all those years.
The interview with Mick from 2010 that preceeded the actual movie was pretty nice too.
So, if you're nearby I can recommend a visit. They show it until Monday 27 september and there's plenty of tickets left for each screening.