BeatBox

This week's edition of the popular hip hop night "True Skool" (which takes place on the second and fourth Fridays of each month at Milk) brings a special guest with a considerable instrument: his voice. Radioactive is known for his work with Spearhead but is also an instant jump-start to any local party thanks to his considerable pipes, which can flip chameleonlike among beat-boxing, singing, and rapping. Radioactive joins "True Skool" resident DJs Coop D'Ville, Jah Yzer, and Ren the Vinyl Archaeologist on Friday, Feb. 13, from 9 p.m. to 2 a.m. at 1840 Haight (at Stanyan), S.F. Admission is $10 at the door, $7 in advance; call 387-6455 or go to www.true-skool.org.

Philadelphia's always-smooth King Britt joins local collective Massive Selector to celebrate his adventurous new electronic soul label Five Six Recordings and its Black to the Futurecompilation with a three-hour DJ set. Musically, the only thing Britt might discriminate against is a bad song. Everything else -- be it house, jazz, hip hop, or funk -- is fair game. Guest vocalists Capitol A and Marque's Raw Soul open, with DJ Rueben and the Massive Selector resident DJs supporting on Friday, Feb. 13, from 9 p.m. to 4 a.m. at Club Six, 60 Sixth St. (at Jessie), S.F. Admission is $10 before 11 p.m., $15 after; call 863-1221 or go to www.massiveselector.com.

Many DJs record mix CDs in controlled environments where there's time for editing and re-editing, some going as far as to masquerade studio sessions as mixes recorded live at some exotic club somewhere. Longtime friends Mark Farina and Derrick Carter (the former a local favorite, the latter a frequent visitor from Chicago) will throw that caution to the wind as they record their dual live set on Friday for a double CD to be released in June. Carter popularized the term "boompty-boomp" to describe his ridiculously infectious tunes, and Farina is equally keyed in to a good groove, so expect this house tag-team to provide more bounce for the ounce than a Richard Simmons workout tape. They join opener Rithma on Friday, Feb. 13, from 10 p.m. till the wee hours at Mezzanine, 444 Jessie (at Mint), S.F. Admission is $20 before 11 p.m., $25 after (discount pre-sale tickets available at www.groovetickets.com); call 820-9699 or go to www.om-records.com or more info.