Are those "balance a coin on a floating lemon" games legal if they're rigged?

Posted by pbzeppelin1977@reddit | AskUK | View on Reddit | 11 comments

Where I work has set one up where if you win you get a free drink and if you lose then the money goes towards the tip jar. You have to use a 20p coin.

The rules they give means it's impossible for you to win. To me this seems like a scam.