It's not often you get a chance to check out a reality TV star. Okay, fine, it's like every other damn day those people just won't go away. But this one's funny, and he proved it by taking home the crown on NBC's Last Comic Standing 2 back in 2004. John Heffron, known to Phyllis Diller as "the cute one," lands at the Houston Improv today, where, in accordance with ancient ritual, he'll tell jokes. It's a safe bet his material will include his battles with the We Gotta Go Girl. (You know the one if she ain't getting play, nobody's getting play.) "Women at bars are like the marines: They don't leave anybody behind," he jokes. C'mon, John, life isn't that bad. Phyllis Diller will always take you home. 8:30 p.m. today; show continues at 8 p.m. and 10:30 p.m. Friday and Saturday, January 27 and 28; and 8 p.m. Sunday, January 29. 7620 Katy Freeway, suite 431. For tickets, call 713-333-8800 or visit www.improv.com. $20.