The Anderson Twins will be the featured performers for Songbook Summit at 59E59 Theaters beginning Aug. 3. During the limited run, the twins, Peter (sax) and Will (clarinet), along with their sextet and singer Molly Ryan, will perform music by Cole Porter, Harold Arlen, George Gershwin and Richard Rodgers. There are four segments, each focusing on a composer: Cole Porter is the subject this week; Harold Arlen on Aug. 9: George Gershwin on Aug. 15: and Richard Rodgers on Aug. 22. A four-show package is available for $120 that includes one ticket to your choice of performance for each composer. For tickets and information, call Ticket Central at (212) 279-4200 or visit www.59e59.org.