Optional 10% on dine-in bills
10%The Real Greek's own service charge statement and Spring 2026 menu say an optional 10% service charge is added to all dine-in bills and removed on request. Its party menu page gives 12.5% as well as 10%, so the rate on party bookings is unclear.
Source: The Real Greek's own published policy. Service charges in the UK are discretionary: you can always ask for one to be removed.