Is it legal for restaurant to force customer to give a certain percentage of tips?

fay_chai_kai: Is it legal for restaurant to force customer to give a certain percentage of tips?
Some restaurant will automatically add 18% of tips to your bills if there are more than X number of guests. Is that legal? Can I refuse to pay the tips if I didn’t like the service?

Answers and Views:

Answer by TonyD
I think it depends on the restaurant.

Answer by Henry
They can set the rule. If you don’t like it, don’t go there.