By Ashlee Green Photos by Clifton Loosier It’s 6:30 p.m. on a Monday night and the city is winding down as workers head home for the day. But for Eric Quarles, 20, of Manchester, and Justin Bermudez, 16, of Perry Hilltop, the action is just getting started. “Let’s go, let’s go,” “Giddy up, giddy up,...