From Andrew Hutto. This seems like a reasonable decision. Offer something that people say they want, give it enough time to find out whether people really want it, and then make the call.
"We have given up the idea of being open on Sunday night. Though it seems that everyone wants Sunday dining options, few people actually go out. It just was not economically viable ... We gave it a shot for 6 months and the cons outweighed the pros."