I am planning a Mardi Gras themed graduation party. Any ideas for a way to make sure everyone has a good time?

For invitations, I will be sending out personilized masks/top hats. I will also have “party favors” such as Mardi Gras beads, tamborines and glow necklaces. I am also on a tight budget so ideas for inexpensive food/refreshments would also be appreciated.