Just chiming in to agree that I've only seen CMs limit seating to those who already had food when the place was crazy busy, like Christmastime and Easter. For places like Cosmic Rays, at those times they will limit entry to one door only and won't let anyone sit unless their party is together and has their food . That said, we've been to WDW 30+ times, usually not at exceptionally busy times, and we have only seen seating limited once, when we went during Easter week and MK was super crowded and the QS places were mobbed.. And there are times when DH and I would like to sit and rest and enjoy our own snack or water, and we will sometimes do that at a QS that has outdoor seating, like the Electric Umbrella or Pinocchio's, but ONLY if there are plenty of other available seats for the patrons. We never do that if seating is at a premium.