Bobble Tiki is reaching that stage of his life where if he were cast as a character on a WB drama it would not be in the role of the troubled young stud. Sadly, he'd wind up as the worldly yet stylish teacher who helps to impart some life lesson every sixth episode or so to the brazen young stud and his friends. Bobble Tiki can live with this knowing that there are still those who are even older than he (unbelievable but true). One of those folks - if only by a couple of years - is singer Paul Wilkinson from the Tacoma band Who Cares.  He's not crotchety old.  He wouldn't yell at you while you stomped on his lawn.  He's wise old and knows what works.  He and bandmate Blue Haired Dave have masterminded the acoustic punk comedy team Who Cares, the top comedy act on Myspace for a while.  Doesn't Myspace have a billion participants?  Anyway, they also cooked up the White Trash Nights at Hell's Kitchen where rock, theater and titillation scrape the legal threshold before tumbling into laughter.  It's VH1's "The Surreal Life" meets Howard Stern.  It's also on Hell's Kitchen's docket twice this week: Last night The Lucky Devils, The Voodoo Organist and The Devils Drums rocked the joint; and tonight the Sesame Street Gangsters, Phillip Roebuck, Esmerelda Strange and 1ManBanjo are in the house of hell.  Paul and Dave play and emcee the 21 and older event.  Bobble Tiki used to hit every show, but not so much anymore.  He has bad knees.  You need good knees for White Trash Night. April 6, 9:30 p.m., $2, Hell's Kitchen, 3829 Sixth Ave., Tacoma, (253) 759-6003. - Bobble Tiki