Former Gov. George Pataki held a secretive lunch with supporters yesterday, fueling speculation that he might make a 2012 run for president. Pataki and five friends met in a private room at restaurant Solo in Midtown. His rep said, “It was not a fund-raiser. He got together with some friends and supporters . . . They did talk about politics, they talked about the future.” As for a presidential run? “He’s going to look at the field and look at what he’s got going on, and make a decision based on those facts. He certainly hasn’t ruled it out.” But a source said, “His name is really low on the chatter list.”