Pianist Glenn Pearson and special guests from Washington theater stages perform an evening of showtunes, with a portion of the proceeds from specialty cocktails and featured appetizers benefiting The Helen Hayes Awards, D.C.'s preeminent theater awards organization. Tonight, Tuesday, Dec. 14, from 7 to 10 p.m. The Quill Bar at the Jefferson Hotel, 1200 16th St. NW. Free. Visit helenhayes.org.