"Go see a straight play and see how you like it." So says actor Richard Schiff from television's West Wing in trying to dissaude theatregoers from only seeing musicals. Why? Because he is starring in a play called Underneath the Lintel on London's West End. It's about Schiff plays a small-town librarian perplexed when a book that is 113 years overdue is returned. Sounds like the kind of thing I'd go and see if I was in London. But I'd see the musicals as well.