On stage, they're Jeeves and Wooster, but at the Oct. 28 opening night party for By Jeeves, they're the musical comedy's stars Martin Jarvis and John Scherer. By Jeeves takes place in a church hall where Bertie Wooster is scheduled to give a banjo recital. His faithful manservant, Jeeves, a lover of music, steals the banjo, forcing Bertie to improvise with a dizzying tale full of romantic entanglements and mistaken identities involving his friends and their love interests. Playwright Alan Ackybourn and composer Andrew Lloyd Webber culled the plot from various works by Jeeves' creator, comic author P.G. Wodehouse. By Jeeves plays at the intimate Helen Hayes Theatre.