Final answer:
A gratuity can vary depending on the type of facility, type of services, and location. It is not always automatically added to the bill and can be subject to sales tax in some states.
Step-by-step explanation:
A gratuity can vary depending on the type of facility, type of services, and city and state where the meeting takes place. It is not always automatically added to the bill by the facility, and it is not always included in the contract, so there may be a question about the amount. Additionally, a gratuity can be subject to sales tax in some states.