Comedian Kevin Hart showed off some serious dance moves Wednesday night. Following the premiere of his Madison Square Garden concert film “Let Me Explain,” he got down at nightclub SL. “It was just a big dance party,” explained a spy. “At one point, Jay Pharoah from ‘SNL’ also got in the middle of the floor and started doing the robot.” We’re told Hart and crooner Ne-Yo hung around in the VIP corner, and according to an insider “were glued to each other’s sides all night like big brother and little brother, and getting everyone’s attention dancing.” Other guests included Sherri Shepherd, Fabolous, Judah Friedlander and Grizz Chapman.