Complex sentence: Initially, Kristal focused on his more profitable East Village nightspot, Hilly's, which Kristal closed amid complaints from the bar's neighbors, whereupon Kristal focused on the Bowery club.
Split into simpler sentences: Initially, Kristal focused on his more profitable East Village nightspot, Hilly's, which Kristal closed amid complaints from the bar's neighbors. After Hilly's closure, Kristal focused on the Bowery club.