Comedians in Cars Getting Coffee

This "new" Jerry Seinfeld project consists of short videos wherein he hangs out with his comedian friends. It is absolutely self-indulgent: he gets to drive around in interesting cars, drink coffee (and often eat lunch) at interesting restaurants in the NY and LA areas, and he gets to hang out (and pay) his comedian friends. But the conversations are fun and often interesting as well, and I enjoy watching someone who seems to enjoy his wealth so thoroughly and with so little drama. I also like Jerry's sense of and interest in the history of comedy.

I have watched the first two seasons. The ones I enjoyed most were Carl Reiner / Mel Brooks and Michael Richards (who played Kramer on Seinfeld) in the first season and Chris Rock and David Letterman in the second.

I would be curious to know how he arranges things with the restaurant owners. Are the other customers, who generally pretend not to notice Jerry and his companions, all plants? Are they all paid?