Now that the holidays are over, the city’s top executives packed Midtown power-lunch spots across town yesterday. At the Four Seasons Restaurant, the Grill Room served heavy-hitters including Henry Kissinger with former AIG chief Hank Greenberg, attorney Richard Beatty with investment banker Felix Rohatyn, while Blackstone founders Pete Peterson and Steve Schwarzman dined at separate tables. Also there were Jeffrey Leeds of Leeds Equity with former Sen. Bob Kerrey and former World Bank president James Wolfensohn at another table. “It was like the first day back to school, except it was 1 percenters in the Grill Room,” said a source. “Everyone was excited to be there. There was even more table-hopping than usual.” At Michael’s on West 55th Street, Kirsten Gillibrand dined with Oxygen Media founder Geraldine Laybourne, while Silda Spitzer was spotted in conversation with MacAndrews & Forbes’ Christine Taylor at a separate table. Gilt Groupe founder/CEO Kevin Ryan dined across the way.