Ribald Rockers Spinal Tap, Tenacious D Team Up For Charity

Benefit for United Mitochondrial Disease Foundation will be held later this month.

Tap the kegs and round up the groupies — two of the biggest champions of rock and roll excess will take the same stage for the first time later this month.

Spinal Tap and Tenacious D will play the House of Blues in West Hollywood on December 20, a sure-to-be-memorable evening that will bring together such classic anthems as “F— Her Gently” and “Sex Farm.”

The show is a benefit for the United Mitochondrial Disease Foundation, according to the D’s spokesperson. Mitochondrial diseases are hereditary disorders that affect a cell’s ability to produce life-sustaining energy. The UMDF’s mission is “to promote research for the cure and treatment of mitochondrial diseases and to provide support to affected families,” according to their Web site.

Tickets for the Tenacious D/Spinal Tap pairing are $50, or $100 for VIP passes. The Naked Trucker will open.

Tenacious D, the comedic acoustic duo of actor Jack Black (“Shallow Hal”) and Kyle Gass, recently wrapped a fall tour with Weezer and Jimmy Eat World (see “Tenacious D: They Rock, You Don’t” ).

Spinal Tap, the stars of the director Rob Reiner’s cult heavy-metal mockumentary “This Is Spinal Tap” and the inspiration for Tenacious D, last performed in June at the prestigious Carnegie Hall (see “Spinal Tap Turn Carnegie Hall Into A Hell Hole” ).

Tenacious D, whose shows are known for attracting celebrities and other musicians, from Beck to Dave Grohl, have also announced two concert dates for next year: January 22 at Roseland in New York and January 24 at the Guvernment in Toronto.