Cheapskate here. Family of 4, $100 a day total for food & extras. This means eating breakfast in the room and one large meal at a restaurant, and we don't buy too many souvenirs anymore. One day we may only spend $60, the next $140, it averages out over a weeks time.
Oh geez, I just reread your question. If I were charging meals I guess $50 a day in cash would be plenty!