As Belloq, the evil archeologist in Raiders of the Lost Ark pointed out, bury a cheap watch in the desert, dig it up after a millennium, and it becomes priceless. Music acts that stick around long enough undergo a similar process, albeit one with less time and intrigue involved. Take Atlanta’s Yin Yang Twins, for instance. If you had told me a quarter century ago they’d still be grinding into the ’20s, I’d have thought you’d stroked out on too many vodka Red Bulls. Time makes fools of us all. If you still have the itch for the music of the early millennium, roll through the Blue Lake Casino at 9 p.m. and slap down $47. Bubba Sparxxx is on the bill, too, if you want to see the primal ancestor of Jelly Roll do that country-rap crap better.