Wasserstein's "Sisters Rosensweig" coasts on comedy at Theater J

Wendy Wasserstein's "The Sisters Rosensweig" is a tough play: Wasserstein thought it was a Chekhovian drama but was surprised at how much early audiences laughed. It's a drawing-room comedy, yet the script is deeply serious about its three sisters -- women of a certain age, and American Jews adrift in London.