(FUNKENTELECHY) P-Funk is a whole mind/body-trippin' philosophy. Tonight's show could be an absurd fiasco or a transcendent celebration of the Clintonian songbook (regardless, pray Bernie Worrell appears). No matter the level of inspiration, a glorious wallow in nostalgia is guaranteed. With a catalog as abundant in sublime, libido-liberating funk as Parliament's, a medley of highlights will suffice—or three hours of "One Nation Under a Groove." (Showbox, 1426 First Ave, 628-3151. 8 pm, $20 adv/$25 DOS, 21+.)