Then, in the department of "if-you-can't-beat'em, join'em", Eli Zabar asked if he would be able to sell some of his locally grown produce (he grows stuff on the roofs of his building) at the greenmarket.

Oh man, that's just classic. I think he should be able to do it, first because it's cool and it'll show-off roof gardens, and second because it'll shut him up.

Also, it's very unlikely that tourists will go to a small greenmarket on the UES after a long day at the Met. What are they going to do--buy some broccoli and eat it in the park?

It was a great moment! I loved the idea and he truly deserves to be recognized for even having a roof garden. And I agree that roof gardens or community gardens should get preferential access to greenmarket space.