That's a real nice plan as a starting point, Dave!
John, a 3-foot wide aisle is often considered to be optimum, but 2 1/2-foot wide aisles are enough if you aren't planning on having a number of people visiting and wanting to pass each other. The 5-foot wide table is fine since it is only a 2 1/2-foot reach from either aisle. The only each problem may be in the corner but probably nothing to worry about.
