The bearded, bawdy and comically bitter Tom Segura gets real about body piercings, the ''Area 51'' of men's bodies, and the lie he told Mike Tyson, There's a game I sometimes play, wherein I imagine which living stand-up comics i would invite to dinner in a sort-of who's who of potluck hilarity. I won't divulge the entire list, but suffice it say I want the storytellers, the ones who weave a yarn so preposterously true that it leaves everyone doubled over in laughter and ready to dish their own anecdote over my impeccably prepared meal. Tom Segura tops that list. He's the comic you want at a dinner party. Segura won't necessarily be the most outspoken guest, but the way he observes human behavior, stores it away in his brain where it can stew into something entirely other, and then recounts that experience promises to be a surefire hit for any such occasion.