I have been on one of the rooftops on Waveland Avenue a few times (left field). There is plenty of good food and booze. Just as good or better than being in a luxury box. They have wait staff, bartenders, cooks, food and booze, maintenance, and expensive real estate costs. Also, the rooftop owners have a revenue sharing agreement with the Cubs. It would be interesting to know what the break even number of patrons per game is.