Tired of beach-going so early in the season and looking for a more cerebral way to enjoy the weekend in, say, air-conditioning? You're in luck. The Hammer Museum is the place to be on Sunday afternoon. The much-lauded Kara Walker exhibition, My Complement, My Enemy, My Oppressor, My Love, ends on Sunday and by all accounts, it's a show you don't want to miss. Doors open at 11am giving you plenty of time for......