Filmstation Gilching is a little cinema is located in Gilching, right on the S5 Herrsching line. It shows films in their original version every Monday evening.
I was reluctant to post this because this may mean finding seats in the future won't be such a cakewalk. ;)
Update: although they say "jeden Montag ein Film in engl. Originalfassung" on their website, they really mean some Mondays, not every Monday.