Most of the time I watch a movie only once in a theatre. If I go twice, it's usually because a) it has many layers that warrant a second viewing, b) it is so kickass that it has to be watched again, or c) my buddy wants to go see it so I'll tag along.
Some obvious movies that come to mind that I've seen twice in the theatre are Memento, Snowpiercer, and Pulp Fiction.