It was part of a tour group, so we got there around 1pm and only had a short time to check out Monte Carlo before catching our bus. Total scam if you cannot enter the private rooms for a casual Sunday tourist definitely not worth it. Needless to say the staff were unhelpful when I informed them about their machines being misleading and ridiculous. After trying to change the bet the machine simply changed to max bet, betting my full 10 euros, and I lost the whole lot in two seconds. The machines are extremely misleading: I put in 10 euros to one of them and wanted to change the bet to a lower one, but the only option was a bigger bet with no possibility of changing back to the lower one.
I decided to try my luck and took out 20 euros, and noticed that in most machines minimum bet is 2,5 - which for me seemed unreasonably high. You have to pay to enter the tables, which is also the only area where drinks are served (I would have had to pay to enter the area to wait and have a drink whilst my boyfriend plays a couple rounds, ludicrous) and for free you can only pay the slot machines.
The staff are short with the customers and speak only French.
We visited the Monte Carlo Casino today, and my opinion afterwards is that it should not be visited for other qualities than its beauty and architectural value.