Before you begin, check your local codes and be sure to comply with the Americans with Disability Act (ADA).
Take the square footage of your area and divide by the space allowance per seat to determine potential capacity. Deuce seating and wall spacing maximize the most space, although diagonal seating also saves floor space.
Note: the ADA requires a 36″ clearance for aisle for dining areas; 5% of the total dining space should be accessible to wheelchair users.