My cousin, who is an adventurous eater, is in town briefly and is staying on the Upper West Side. I hope to have lunch or brunch with him this Saturday before he heads off to the airport for an afternoon flight. Does anyone have any suggestions for an interesting or unusual lunch or brunch spot on the Upper West Side or fairly convenient to it? When I asked him his preference, he chose funky over fancy. Wherever we go, it has to be quiet enough to permit conversing easily and not so busy that it's problematic whether we even get seated before he has to go. Suggestions for ethnic restaurants are encouraged.