This is what happens when you walk into House of Blues in Chicago with triplets Nicole, Erica and Jaclyn Dahm: Word spreads like a Malibu brushfire that someone important has arrived. “Who is it?” people whisper, frantically scanning the room for the source of the excitement. “There!” someone shouts, pointing to the doorway, where three tall, blonde, svelte, identical women stand, dressed in jeans and T-shirts, oblivious to the commotion they’re causing. Men gawk. Are they models? Playmates? Women give our Miss Decembers astonished once-overs. Servers fight to balance wobbly trays of food, their arms suddenly gone limp. The maître d’, who just told the party in front of you that there is a 35-minute wait for a table, whisks your group into an elevator and up to the VIP lounge. Long Island iced teas are rushed to the table. Busboys sneak from the kitchen for a glimpse. The waitress says, “Are you triplets? Wow! You’re so pretty!” Welcome to Dahm mania, a phenomenon that started on December 12, 1977 when Nicole, Erica and Jaclyn were born, in that order, to parents Robert and Donita. The triplets have been in the spotlight ever since, including a Hardee’s commercial when they were eight years old, victory in a Teen magazine model search at the age of 16 and appearances on talk shows, including The Jenny Jones Show and Ricki Lake.