For an event with your tent being installed on grass and banquet tables used for seating of 1 to 48 guests.
Your best option would be a 20×20 canopy pole tent, or a 20×20 frame tent, or a 15 x 30 frame tent.
Your best option would be a 20×20 canopy pole tent, or a 20×20 frame tent, or a 15 x 30 frame tent.