The thing is that the food price (e.g: menu item) already includes that - so there shouldn't be a tip to begin with. IMHO they should add a mandatory 20% servi

The thing is that the food price (e.g: menu item) already includes that - so there shouldn't be a tip to begin with. IMHO they should add a mandatory 20% service charge _after_ they discount all of the menu items by 20% - or simply get rid of the tip entirely.