The typical wedding or garden party under a tent will require space for guests to be seated at round tables, as well as space for buffet, head tables, bars, and dance floor. Although every party has unique requirements, the general rule for this type of party is to allow 18 square feet per guest.
Cocktail Parties/ Since there is not the need for as much furniture at a cocktail party, (minimal seating, smaller food stations, etc.) the space allowance can be reduced to 10-12 square feet per guest. Ceremony or Row Seating/ For wedding ceremonies or public assemblies, one must allow for the chairs, space between the rows, aisles, and space required for the podium and/or stage.
The suggested allowance is 8 square feet per person.
Please remember no two functions are alike. Each event deserves to be looked at individually. Be sure to check with the caterer or band for any special needs.