20x20 High Peak Frame Tent - 8 Foot Legs - Total Height of 14 feet
 
Can be set-up on grass or on pavement.  
 
Seating Capacity:
33 Guests for Sit-down dinner
40 Guests for Buffet-style dinner
50 Guests for Cathedral (row) seating
80 guests for Cocktail party
 
Here's a helpful link for possible seating arrangements under a 20x20 tent. 
https://americantent.com/blogs/now-trending/20-20-tent-layout?srsltid=AfmBOophWaULghidTlmABgosE2xnCpJAlJrDSNA1m4jb8V6kw2i50rmL