"Rhythmically dazzling," says Melody Bowman, an attendee of That 1 Guy's Thursday night concert at Beatnik Studios. "You think you have the Magic Pipe figured out then That 1 Guy pulls out the Magic Saw and the Magic Boot."    That 1 Guy, the one-man band of Berkley, California, performed for his second time at Beatnik Studio this Thursday. This was the second stop on this year's tour promoting his new album "That 1 Guy and the Magic Pipe Packs a Wallop!"    Alvi McLeary of Cosmic Family Lighting provided an amazing laser light show and sound that truly brought the show together.    The show was opened by Pops the Beat Wizard, a local act specializing in electronica. Pops set the