A restaurant pager, also known as a guest pager or a coaster pager, is a small wireless device used in restaurants to notify customers when their table is ready or when their food is ready for pickup.

When customers arrive at a busy restaurant and put their name on the waiting list, they are usually given a pager device. This allows them to wander around the restaurant or even leave and come back without losing their place in the queue. When their table is ready, the restaurant staff will send a signal to the pager, causing it to vibrate or emit an audible sound, notifying the customer to return to the host stand to be seated.

Similarly, in some restaurants, customers can order their food at the counter and then receive a pager, which will vibrate or beep when their food is ready for pickup. This allows customers to wait comfortably or wander around the restaurant without worrying about missing their order.

Overall, restaurant pagers are a useful tool to improve the customer experience and reduce crowding and congestion in busy restaurants.