On its 2013 release Ouroboros and the Black Dove, Knoxville, Tenn.–based Hudson K doesn’t stick to any one mode. From danceable pop jams to keyboard-heavy power ballads and almost prog-metal romps, the group moves beyond the synth-rock categorization it assigns itself on Facebook. Classically trained vocalist Christina Horn channels Annie Lennox with lingering, ominous vocals, particularly on the group’s 2012 single, “The Knife,” and drummer Nate Barrett contributes pounding beats to Hudson K’s dark but danceable creations. Their live performances aren’t overtly gimmicky (though the group does incorporate a wireless keytar), but look out for short performance-art pieces when the duo performs at Trinidad’s Treehouse Lounge: At past shows, the band has brought knives and belly dancers onstage. Local opening trio Night Kitchen provides an appetizer of guitar-heavy rock to complement Hudson K’s keyboard entrée. After Hudson K’s set, stick around to see if the theatrical dark rockers of Precious Child bring in their own dancers or just play a standard rock show. Hudson K performs with Precious Child and Night Kitchen at 7:30 p.m. at Treehouse Lounge, 1006 Florida Ave. NE. $12. treehouselounge.com.