Clearly, you guys are all doing it wrong.
You need to get a copy of the movie schedule and compare screen times. If you do it right, you can see 2 or 3 movies on one ticket.
As one of those high school kids who used to work at a movie theatre, the biggest thing we were worried about was selling food because almost all of the ticket money went straight to the production company. If someone came in and saw 3 movies on one ticket, we couldn't care less as long as they were getting stuff at the concession. At the end of the night, they would check sales -vs- tickets to calculate how much $$$/person you sold so it actually helped our ratio. The only thing better were the random weirdos who would come in just to buy popcorn and then leave...no movie, just popcorn.