When out-of-towners are in for the weekend and request to see movie stars, you want to make them think you're tapped into the Hollywood scene, don't you? So you get in your Ford Focus and sputter by the Ivy, which is too pricey to eat at and way too swamped by the paparazzi to actually discern whether it's Maria Shriver or Keira Knightley who's not eating her lunch. You could take your chances at Mr. Chow's, but that's a crapshoot. And supplying tickets to The Price Is Right to see Drew Carey should only be considered as a last resort. What to do? Go to Mo's. This comfortably casual eatery with stellar burgers is where filmdom's famous like to hang after, before or during a meeting at nearby Disney Studios, Warner Bros., NBC or Universal. Recently spotted: Sandra Bullock, Steve Carell, Billy Ray and Miley Cyrus, Zac Efron, James Franco, Jake Gyllenhaal, George Clooney, Shia LaBeouf, Jay Leno, Matthew McConaughey, Julie Andrews, Robert Downey Jr., Paula Abdul, Clint Eastwood, Helen Mirren, Joe Pesci, William Shatner and John Stamos, to mention but a handful. As general manager Mark Harrison puts it, "On any given day, it's like the Warner Bros. commissary." 4301 Riverside Drive, Burbank. (818) 845-3009, eatatmos.com. ?Heidi Dvorak