The already commercially crowded Mall of Georgia area near Buford is poised to get a lot busier over the next few years. A mixed-use development featuring 162,000 square feet in retail and commercial space, as well as a 156-room hotel and 42 condominiums that would be included in a 21-story building, was approved Tuesday night by the Gwinnett County Board of Commissioners. The 16-acre development off Woodward Crossing and Mall of Georgia boulevards also would have a 50,000-square-foot family entertainment center, 76,000 square feet in office space and a grocery store.