Hi J.,
What a fun idea. For food, I would suggest heavy appetizers instead of a sit down meal... catered if possible, Vegas style. For prizes, you could equate number of chips won for each prize; the more the chips, the better the prize. As far as quantity and method, it really depends on how big or small the party. How many people are you inviting? I am a Party Planner and would be happy to give you some free ideas. And if you are interested, I can give you a quote on invitations and/or favors. I specialize in unique & whimsical "message in a bottle" invitations & favors - all mailable in some clever way, see-through bottles, containers, etc. filled with miniatures to fit the theme. Last year, I had a client who was throwing a bachelorette party in Vegas and I did the invitations & favors. I have the samples which I can email you photos of and/or come up with something new. I provide quantity discounts. Send me a message with more details on your party, number of guests, locations, date & time, etc. and I'd love to brainstorm ideas with you. If you're doing everything yourselves, I can give you some basic ideas for free. If you're interested in having invitations or favors done, then I can get more elaborate. My website www.menneeexpressions.com is under construction and you can read reviews from past clients on Mamasource. :)Have fun and Happy Birthday!