Jimmy Carter, Bono and Nile Rodgers made for a surprising trio of revelers at New York’s Hammerstein Ballroom last Friday night. On the red carpet before Rodgers’s April 29 charity fundraiser, the three men mugged for the cameras as if they were BFFs. (Later in the evening, U2 frontman Bono danced on a table inside the restored 110-year-old theatre.) The celeb-filled event wasn’t as wild as the Studio 54 parties about which Rodgers, 63, and his band Chic sang on their 1978 di