I was never asked to contribute to an event other than to bring food. The congregation funds paid for the temporary property rental.
However, when ever there is a "Feed the Speaker" no one wants to host this so we do it at a local restaurant. I always felt bad for those who were too poor to go to a restaurant. Because they had no money, they would be excluded from the occasion.
My favotite "Feed the Speaker" story (in my sisters congregation). The speaker and his wife were handed two brown paper bags with sandwich, fruit, cookies and drink. Come to think of it...Isnt this what we are now suppose to eat at the DC? See..this is how things get started.