Americans revel in whooping it up for Cinco de Mayo, and they can do just that Mon., MAY 5, at the American Kidney Fund's MARGARITA TASTING. The event will benefit kidney patients, helping to provide treatment-related financial assistance and aid to dialysis recipients. Ticket price includes dinner and hangover. Must be 21 and older. $50. 6:30 p.m. No Mas! Cantina, 180 Walker St. 404-574-5678. www.nomascantina.com.