They found fame and fans as cast members in Broadway’s Jersey Boys, and now Christian Hoff, J. Robert Spencer, Daniel Reichard and Michael Longoria have reteamed to form a ’60s-centric act they call Midtown Men. On January 8, the stars performed a pair of showcases at SIR Studios in Chelsea, including songs from their new CD, Sixties Hits. The guys showed off their skills at four-part harmony in faves such as “Time of the Season,” “Up on the Roof,” “Happy Together” and “Big Girls Don’t Cry.” Click on for snapshots of four Broadway faves in action.