There are several advantages of using robot servers and table bussers in a restaurant:

1. Improved efficiency: Robot servers and table bussers can work around the clock without needing breaks or rest, leading to improved efficiency and productivity.
2. Reduced labor costs: By using robots instead of human servers and bussers, restaurants can reduce their labor costs over the long term.
3. Enhanced safety: During the COVID-19 pandemic, using robot servers and bussers can help reduce the risk of transmission of the virus among staff and customers.
4. Novelty factor: The use of robots in a restaurant can create a unique and memorable experience for customers, attracting new customers and generating positive word-of-mouth.
5. Consistency: Robot servers and bussers can perform their tasks with a high degree of consistency, ensuring that each customer receives the same level of service.
6. Data collection: Some robot servers and bussers are equipped with sensors and cameras that can collect data on customer behavior, such as how long they stay at a table or what items they order, which can help restaurants improve their service and marketing strategies.

Overall, the use of robot servers and table bussers can help restaurants improve their efficiency, reduce labor costs, enhance safety, create a unique customer experience, ensure consistency, and collect valuable data.