Galactic formed 18 years ago in New Orleans when it played one of its biggest gigs to date: Mardi Gras. Shockingly, the group hasn't made a Carnival album until now. Better late than never for fans of its upbeat grooves and electric rhythms. Special guest Corey Glover of Living Colour joins them. The El Rey Theatre, 5515 Wilshire Blvd., L.A. 8 p.m. Thu. $30. (323) 936-6400; http://www.theelrey.com.