For Banquet Style Seating:

When using oblong tables, divide the room area (sq. ft.) by 8. When using round tabnles, divide the room area (sq. ft.) by 10. These figures represents 8 chairs per table. If space is available for more comfortable seating, please allow an additional 2 sq. ft. per person.

Aside from the main traffic areas, allow 54" between round tables for chair and service space and 60" between oblong tables where searing is back to back. This permits 24" service space behind 18" chair depth.

For Theater Style Seating - Diving the "spectator" seating areas (sq. ft.) by 6. This method of figuring allows for chair and passage aisle. It does not allow for problems caused by traffic aisle, location of columns, service doors or unique room shapes. It is useful for a quick, general approximation.

Seating & Space Guide