The President and First Lady help open Arena Stage's sparkling new Southwest complex with a gala ceremony on Monday, Oct. 25, but first comes a public Homecoming this Saturday, Oct. 23, with free performances, events, demonstrations and tours. The festivities start with a ribbon-cutting ceremony at 11:30 a.m., and conclude with a special performance featuring the cast from the new production of Oklahoma! and other special guests at 5:45 p.m. Other highlights include a Show Choir Spectacular featuring two local high schools, the Manzari Brothers, Washington Improv Theater, Liz Lerman Dance Exchange and several cabaret shows with Arena Stage favorites. Saturday, Oct. 23, from 11:45 a.m. to 6 p.m. Mead Center for American Theater, 1101 6th St. SW. Call 202-488-3300 or visit arenastage.org.