The weekend before the Martin Luther King Jr. holiday (Monday) is always an excuse to party. We say, what better way to celebrate equal rights, unity and goodwill toward man (and woman and everything in between) than on the dance floor? Two diverse dance haps promise MLK-appropriate madness to the max: '80s night Club Beat It returns to the Ruby for one night only, joining forces with '90s party Club Wannabe for a dueling-decade showdown. Expect exuberant young clubbers getting their retro rump-shaking on like the millennium never happened. 7070 Hollywood Blvd., Hlywd; clubbeatit.net. Trannyshack L.A. returns for the new year with a stellar lineup of dragged performers (including a special appearance by NYC's legendary Sherry Vine) and featuring House of Shade DJs David Banjela and Hotne$$a spinning sexy sounds for tranny fannies and fun-lovin', bi and straight booties alike. At the Echoplex, 1154 Glendale Blvd., Echo Park; trannyshack.com. Both clubs, this Sun., Jan. 16.