I found this ad while going through looking for 1975 concerts for the Tomorrow Club list. It’s for a Pink Floyd concert film in late July of that year. Of course, everyone knows the Foster as a porn theater (oldest movie theater still in operation in Youngstown BTW), but it did sort of get into art house and foreign films from time to time back in those days.
I have no clue as to what the Pink Floyd concert film was here. I’m leaning toward something from the Dark Side tour. Perhaps it was just the album set to the backdrop film the band used. It definitely did not have anything to do with Wish You Were Here as that wasn’t released until September 1975.