Soda Jerk, Denver's premier promoter of punk and hardcore, had been dwelling comfortably in Rock Island for two years. At least it seemed like a cozy fit -- until February, when Soda Jerk's Mike Barsch abruptly yanked up roots and replanted his operation in the newly refurbished Marquis Theatre. His timing couldn't have been better; as Brendan's Pub and an earlier incarnation of the Marquis, the LoDo locale had its share of struggles over the years. But now, after massive reconstructive surgery and Barsch's aggressively adventurous calendar of events, the Marquis is well on its way to regaining its glory.