Luscious Jackson were to New York freestyle dance pop what their cohorts the Beastie Boys were to hip-hop: a sly subculture riff that delivered the goods with a wink. On this tight, 10-song reunion (minus singer-keyboardist Vivian Trimble), vocals still waver charmingly off-key, grooves still conjure a Nineties Lower East Side rent party. “You are my male J.Lo/Your jeans fit nice/ What’s your price? . . . I have no pride,” chants Jill Cunniff on “#1 Bum,” a shout-out to a fine rump that rides a punky reggae groove. Homeboy Adam Horovitz lends a production hand for “So Rock On,” a sexy midtempo jam whose title sums up the ethos here. Welcome back, ladies.