Two Synagogues, One Sinner

A cruise liner goes down in the Pacific and Benny is the only survivor. He manages to swim to an uninhabited island.

Many year's later, when a search party finally comes to rescue him, they see that he has constructed two synagogues on his tiny island.

"Why the two synagogues?" the leader asks Benny.

Benny points to the nearest one and replies, "That's the one I go to every Saturday. The other one, I wouldn't go inside if you paid me."