It is common to see “++” on restaurant menus. One ‘+’ for the GST another for the service charge. In Singapore, it is a ‘custom’ most restaurants have a 10% service charge on the menu.
CAN I SAY NO IF SERVICE LOUSY?
Nope, it is often clearly displayed in the menu that a 10% charge will be applicable for your food orders. If a dispute occurs and you refuse to pay. Worse might happen is going to court.
But back again, is it fair to consumers? Sometimes I visit restaurants and get rude attitudes, slow service and etc. Feel like that 10% is paying to get Shi**ty Service.
Your best bet is to not visit any restaurants and go coffee shop loh.