Inconsiderate - Very Displeased

A group of people went to chef and the fat man on Saturday for a birthday party. The level of service was moderate. As people had to wait quite a while for their food, beverages, even though each had their own bill. The food was bland, which most people said after ordering whereas other specific meals tasted good. a few people were still sitting there till 9:30pm and all the lights was switched of without giving us any notice. this was very unprofessional as of someone had to fall or get hurt I do not think that the restaurant would done anything. Due to the lights been switched of we left half the cake there and forgot to take it as everything was so dark. when called the next day all the guy said was we thought you'll did not want it and gave it to the staff, then he said that we can come fetch it. I think this is totally unacceptable. If they wanted us to leave then could have told us politely, as we were already getting ready to leave. Really displeased.