I think it's fairly common for the charity itself to pay for the lunch, either from a donation of goods by the restaurant or out of the winning bid.
The charity seems to have priced most of the lots at a $1500 value. I think they're trying to make it sound better by giving a high value, but that could backfire. The only part of the winning bid that is tax deductible is the part above the value (that part, as far as the IRS is concerned, is the part that's a charitable donation). Many charities try to minimize the value. For example, Broadway Cares prices all of its walk-ons as $0. (The walk-on packages often include tickets for additional guests, which are priced accordingly.)
"What was the name of that cheese that I like?"
"you can't run away forever...but there's nothing wrong with getting a good head start"
"well I hope and I pray, that maybe someday, you'll walk in the room with my heart"