I'm the one who did Wegmans catering. We had our "eating part" at around 5 pm, I believe. Initially I also was thinking drinks and cake but then decided to do more - and that was a good call. Kids were ravenous after hour+ of intense physical activity and adults seemed happy to have some food, too.
I also bought little waters/little organic milks in addition to "standard" organic juices. Also got several comments about "amazing choice" (really?
Yes, it does add up, but really it is relatively minor expense compared to the money you are already spending on the place/goody bags (and yes, I didn't get the usual "bag of junk", either). I do however have an issue with ridiculously overpriced pizzas that are normally offered as a "tie-in" through the party places (as in twice the price, half the quality of regular pizza chains).
So for all of you fed up with "pizza+juice" combo I just have the usual Gandhi quote: “Be the change that you wish to see in the world.”
I do however wish that everyone would RSVP. Please, people, pleeeeeeeese!

(I was reading the recent thread about people not RSVPing and one poster was nonchalantly writing about never having time to RSVP... It made my blood boil, but I resisted the extremely powerful urge to call her all the really bad names and closed the forum right away