Theater Seating

The rather broad lady showed up at the theater just before the performance started and handed the usher two tickets. "Where's the other party?" asked the usher.

"Well," said the lady, with a blush, "you can see one seat is rather uncomfortable so I bought two. But they're really both for me."

"Okay with me, lady," the usher replied, scratching his head. "But you're gonna have a tough time. Your seats are numbers fifty-one and sixty-three."