What kind theme should i have for my 28th birthday party?

i am having my 28th birthday party on july 30 but i don't have any ideas on what to do i want to have a glee themed birthday but i am not sure how to carry it out . and then it was also suggested to me to have a glee/family guy themed party because these are two of my favorite shows . so does any ideas or new ones are welcomed . the party is going to be in my back yard and im am barbecuing