Blood on the Dancefloor make unintelligable, costumed electro racket to us olds. But if you’ve got a troubled preteen, their set tonight (Thursday) at Upstate Concert Hall might be some kind of therapy (7:30 PM, $18, 371-0012). . . . Pigeons Playing Ping Pong? Now that’s wholesom entertainment. They’re at Red Square tonight (8 PM, 465-0444). . . . Skeletons in the Piano shake their bones at Bogie’s tonight for free (482-4393). . . . What’s a Zoogma? Find out tomorrow (Friday) night at Valentine’s (9 PM, $12, 432-6572). . . . Heather Graham and the Slushpile Players are, to the best of our understanding, a jam band not fronted by the actress—which is probably for the best. They’ll be at Red Square on Friday (8 PM, 465-0444). . . . The annual Old Songs benefit on Saturday will feature Songs of the Carter Family (8 PM, $15, 765-2815). . . . The Infamous Stringdusters will play a Farm Aid afterparty at Putnam Den on Saturday (11 PM, $20, 584-8066). . . . Former Dispatch-er Pete Francis comes solo to Valentine’s on Saturday (8 PM, $10, 432-6572). . . . Bobby Previte brings his Voodoo Orchestra North back to Club Helsinki on Monday (8 PM, $7, 828-4800). . . . the New Gary Burton Quartet will come to Saint Rose for the jazz musician’s 70th birthday tour on Tuesday (7:30 PM, $15, 337-4871).