“Love & Hip Hop” stars Rich Dollaz and Erica Mena celebrated the VH1 show’s new season with a restroom romp at Cafeteria. Following the premiere party at Kiss & Fly, the pair hit the Chelsea restaurant, where they caused a backup in the loo line. A spy said, “Security were knocking, but no one would come out. Rich and Erica emerged from the stall disheveled.” Staff asked the couple to leave, and “Rich was staggering. He almost fell,” says the spy. “He got into a Mercedes, and friends had to get him from the driver’s seat to the back. Cops were called, but they’d already left.” Dollaz told us, “You can run with the sex in the bathroom. I won’t confirm or deny. I vaguely remember being there. It was a fun night.”