According to Baidu's experience information, the restaurant needs two stairs for the following reasons:

1. Safety considerations: setting two stairs can increase safety. If there is only one staircase in the restaurant, it will be difficult to evacuate people in case of fire or other emergency, which makes the staircase unusable. And there are two stairs that can provide backup access, so that people can leave the building quickly and safely. 2. Flow diversion: Two stairs can help divert the flow of people and reduce congestion. Especially during peak hours or busy dining hours, the two stairs can better manage guests' access and reduce waiting time and congestion.

A restaurant refers to a facility or public dining room that provides food, drinks and other meals to the general public in a certain place.