BW, if you put a speaker out in the back, will it shut the crows up? And what ARE you doing about sound anyhow? Remember that the more seating (and people) you add to the room, the more it will absorb sound. The ones I have been at have been totally acoustic-- are you locating your performers for best bouncing-around-the-room sound?

And will everyone be able to see? Are you raising them up any, or offering them a high stool, etc.? Are you arranging chairs with tallest-sitting at the back, and will there be some pillows in front for layabouts? What about accessibility for people with mobility impairments, and reserved seats for anyone with back problems or other special needs? (Not everyone who needs some accommodation is wheelchair-bound.)

Do you have an overlfow seating space where people can hang out until the "break and switch places" time, if attendance gets past your seating area?

~S~