seated based on whether they have reservations, or for those without reservations, on a first-come, first-served approach; however, important customers or celebrities may be put to the front of the line. In restaurants, customers may also be able to jump the line by giving a large gratuity or bribe to the maitre d'hotel or head waiter. Some restaurants which are co-located with or combined with a retail store or gift shop ask customers who are waiting for a table to browse in the merchandise section until their table's availability is announced on a PA system or via a pager; this strategy can lead to increased purchases in the retail part of the establishment. One combination restaurant/store is the US Cracker Barrel chain. Some restaurants ask customers who are waiting for a table to sit in the restaurant's bar or its licensed lounge area; this approach may lead to increased sales of alcoholic beverages. Waiting rooms may be staffed or unstaffed. In waiting rooms that are staffed, a receptionist or administrative staffer sits behind a desk or counter to greet customers/clients, give them information about the expected waiting period, and answer any questions about their appointment time or the appointment process. In doctors' or dentists' waiting rooms, the patients may be able to make additional appointments, pay for appointments, or deal with other administrative tasks with the receptionist or administrator. In police stations, check cashing stores, and some government waiting rooms, the receptionist or administrator is behind a plexiglass barrier, with either small holes to permit communication, or, in higher-security settings, a microphone and speaker. In reception areas with a plexiglass barrier, there may be a heavy-duty drawer to enable the client to provide money or papers to the receptionist and for the receptionist to provide documents to the client. The plexiglass barrier and the drawer system help to protect the receptionists from aggressive or potentially violent clients. Amenities Most waiting rooms have seating. Some have adjacent toilets. It is not uncommon to find vending machines in public waiting rooms or newspapers and magazines in private waiting rooms. Also common in waiting rooms in the United States or in airports are public drinking fountains. Some waiting rooms have television access or music. The increasing prevalence of mobile devices has led to many waiting rooms providing electric outlets and free Wi-Fi Internet connections, though cybersecurity is a concern as unsecured connections may