Can't ever remember using the place myself, anyway I don't think it lasted that long. I think the police got it closed down. It was another I believe owned by the son of Rob Pryke (the banana king) who owned the Moathouse Club in Bradford Street although The midnight City was under the Moathouse Club the entrance was in Moat Lane. I don't think it ever had a Alcohol Licence hence it was raided by the police several times.
added later'
Thinking about it I can't see how the entrance could have been in Moat Lane, Smithfield Street or Mill Lane possibly but not Moat Lane, I suppose that's another warning not to believe everything you read.