You can check www.talkinbroadway.com, click on Washington DC and then go to the calendar for the season, it'll show you everything playing in DC for the time. I'm pretty sure Evita doesn't start till May 3.
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli