Get up and active on Valentine’s Day at this fast-paced fitness party on February 14 taught by Michelle & Wisty and music by DJ Michael, who will be playing your fav female artists all class. 7:30 p.m. BFX, 699 Boylston St.
Move your interval workouts inside this winter with the new Kendall Square location (with another opening soon in the Back bay) of this haute boutique fitness center. Pick one of the 40 60-minute classes held per week for the workout that can burn 900 calories during each workout. 270 Third St., Cambridge
Just have 30 minutes to get your workout in? Equinox’s new Firestarter class uses your own body weight and a step bench to get in a high intensity workout in just 30 minutes. The trick is you are constantly moving, from high-powered sequences to active recovery periods. Your body will still be burning calories long after the class. 131 Dartmouth St., 617-578-8918; 225 Franklin St., 6170426-2140