The seating capacity is 1200 guests. To calculate this, first convert the measurements to meters: 30 ft = 9.14 m and 40 ft = 12.19 m. Then, calculate the area of the dining room: 9.14 m x 12.19 m = 111.9 m2. Divide this by 1 m2 per guest to get the seating capacity: 111.9 m2 / 1 m2 per guest = 1200 guests.
