Wait, don’t I know you? That’s what some at the Lenny Zakim Fund’s annual Casino Night fund-raiser must have been thinking when they saw NeNe Leakes. The reality TV personality — she’s one of Bravo’s “Real Housewives of Atlanta” — was one of a couple familiar faces at the event over the weekend. Also attending were Patriots players Patrick Chung and Danny Amendola. The event at the Four Seasons raised about $200,000 for the Lenny Zakim Fund, which helps needy people address social and economic injustice.