Being expected to leave a cash tip would completely destroy the point of this benefit (you can always leave extra if you got exceptional service or at the end of a longer stay). At the Montreal IC (North America is where tipping culture is the worst imo) I got a chit that the waiter took at the end, no bill of any kind. At the Berlin IC I ate at the club but had breakfast at the restaurant once and again I was not presented with a bill of any kind.

System seems to be working as intended (saw a few other similar reports across other threads).