Bear Grass will “ooze newness” at Putnam Den tonight with Hollows (Thursday, 9:30 PM, free, 584-8066). . . . Celebrate Valentine’s day with Robert Randolph and the Family Band at Bearsville Theater on Friday (9 PM, $35-$45, 845-679-4406). . . . “Latin jazz institution” Chris Washburn and the SYOTOS Band come to Bard’s Fisher Center on Friday (7:30 PM, $20, 845-758-7900). . . . Mirk will play the Hollow for Valentine’s Day on Friday (426-8550). . . . Super 400 will shake the cabin fever Friday at Putnam Den (9:30 PM, $8, 584-8006). . . . Darius Rucker (left) and his country blowfish play the Times Union Center on Friday (7 PM, $32.50-$50.50, 487-2000). . . . Troubador Steve Earle is back at Club Helsinki on Saturday (9 PM, $60, 828-4800). . . . The Half Moon in Hudson celebrates its first birthday on Saturday with DJ Blacktwitter and Lunar Moss (9 PM, free, thehalfmoonhudson.com). . . . The Erotics will officially christen the new Low Beat (335 Central Ave., Albany) on Saturday (8 PM, 432-6572). . . . Jazz singer Janet Monheit will bring the romance to the Egg on Sunday (7:30 PM, $29.50, 473-1845). . . . It would be just like him to show up to the F*ck Kanye Party at the Fuze Box post-show Wednesday night (8 PM, $10).