Oddly when we were in maze in December they were approaching some1st sitting tables and offering kitchen tours. Couldn't think of anything more boring and so was dreading the offer as it was being whispered as if it was great offer.

However the tours were not offered after a certain time. My guess is that it is a way to clear the tables without upsetting the clients as every table that was offered a tour was filled up quickly whereas those who didn't get a tour and so lingered their tables remained empty after they left.