In both venues, we move the cocktail tables + stools along the sides of the dance floor area as guests sit down and invite vendors to eat there. (If you are in the Two-Sixty, also the couches in the bar area).
We find vendors like to take their break a bit away from the action. It's rare we see a vendor table. We find that vendors are not expecting a vendor table among the guests, but if you want to have one (or not), it's up to you.