Probably the first movie I saw more than once in the theaters as it came out was Empire Strikes Back, but I didn't pay for more than one ticket.
Cut school early to wait on line that day, then sat through the next 3 showings of ESB on opening day->night.
As the new audiences came in and sat down around us, many were already saying
...did you here that ...about Vader being Luke's father ..etc???
Obviously people were spoiling the movie as they left, to the people waiting on line for the next showing.
I probably saw it again in theaters for the special edition, if that counts?
Saw Rocky Horror at the Waverly & 8th Street to many times to remember.
And used to see several repeat revival screenings of Bruce Lee Enter the Dragon etc., Dollars trilogy and other junk..
I'v seen several screenings of Metropolis and the original Mark of Zorro, both with original scores and modern scores with live "pit" orchestras, incredibly brought those movies to life!