Alex DePue played an open mic night Nov. 11 at Lestat’s, a tiny San Diego club that seats just 50. But his performance of “Owner of a Lonely Heat” was filmed and somebody put it up on YouTube. Now he’s famous. “It got 80,000 hits in the first week. Now, it’s up to over 781,000 hits on YouTube alone. If you include the other Web sites that have posted it, like break.com and iFilm.com, and add them up, we’ve had 1.5 million viewings.”