So my caterer included a labor fee, food fees, etc. in her final bill but did NOT include gratuity - it specifically says gratuity is up to the client. Given that the total bill is around $4800 and $800 of that is labor costs (her people will have worked 10ish hours that day, assuming they stay and break stuff down like they're supposed to, which she seemed surprised was in the contract, but she both wrote and signed it so...) what (if anything) would you add for gratuity, assuming they do an average job? It's a buffet meal and her people are not tending the bar, but are setting up and breaking down all the tables and chairs, etc.