In past years, I used to have a big Home Opener Theme Party and buy a big block of group tickets.   Attendees would dress up in the theme and obviously all sit together.  Past themes included: 
  
Hillbilly/Redneck (by far the most fun and most creative attire, I bought a box of Billy Bob teeth to pass out) 
Mardi Gras (beads and masks) 
60's (T'Dies) 
Tiki Bar (Hawaiian shirts, leis, grass skirts, bikini tops)