A border area of seating. Traffic between tables should be limited to those people playing at the tables. Space between the tables should not be used as aisle-ways to other parts of the building. The minimum distance of a table from walls, furniture, or other fixtures should be 6-feet. Keeping this minimum distance should reduce clashing of sticks or the need to sit on another table to shoot.
Lighting is also important.
Use duplex outlets placed in the ceiling above the planned table positions to allow for easier re-arrangement of tables should the need arise. Each outlet would be wired to a switch so each table's lights can be turned on, or off, without affecting the other tables. Provide for room lighting in addition to that over the tables. Indirect lighting would be best as it reduces strong shadows. Use refrigerated air to reduce the amount of moisture the table frames and rails are exposed to.