We had my LO's 5th birthday at a jump place last weekend and these are some things I would do differently:

I say this after every party but I always forget and I always buy a large veggie platter that isn't very popular.

Bring more water next time. The kids got very thirsty during the jump party and they went through the bottled water very quickly and the fountain looked really gross.

I think it was her last big party for a few years but next time we will chose a better date (she has a late dec bday) and do it mid Dec or after school starts again in Jan.