Generally how much per plate for an afternoon party?

I did can't find that information out on site

Go on they're website.

Hello Don, Our pricing is based on many factors, the time of year, the day of the week, time of day, menu selected, etc.  Please give us a call or send us an email detailing the type of affair you are envisioning.  With a clearer understanding of your special requests, I can better quote you a price. We are here seven days a week, any time after 10 am.  I look forward to speaking with you as well as give you a better understanding of the amenities we offer. Thank you Robert