John, if you recall my room plan, I really don't have a back wall that I call part of the HT area. This drawing is not really to spec, as the right side wall appear shorter by scale. Maybe using the mid point of the left/right walls and keeping the 500 on the left side, as you mentioned that it would be the farthest from the open area?
The area behind the HT seating is actually a walkout area. We are planning on possibly putting a retro 50's corner booth and some black/white checkered flooring. The Pool table and bar area will be next to that where the room opens up.