A couple of days ago the Groupon deal was a brunch twofer at a restaurant I had never heard of, Sinha. I looked up the menu and the Sunday brunch turns to be an all-you-can-eat Feijoada buffet, which certainly sounds interesting. Have never yet had a good Feijoada in Chicago. Can anybody give a field report on Sinha? Yelp is mixed---people seemed confused and, indeed, presentation sounds out of the ordinary.