Comedian Dava Krause is in the bar talkin' about fancy German water, improv vs. stand-up, her self-righteous advice to young comics, Jewish geography and more. br br Dava Krause has a recurring role on "House, M.D." and performs stand-up regularly at The Hollywood Improv, The Ice House and on Tom Arnold's show "Laughing with the Stars “ at The Laugh Factory. She has also traveled all over the country performing in clubs, colleges and festivals.