Here are some tips to increase sales in a restaurant:

Menu Optimization: Offer a well-rounded menu with a variety of options that appeal to a broad customer base.

Marketing and Advertising: Advertise the restaurant effectively to reach a wider audience.

Special Offers and Promotions: Offer special promotions, discounts, and events to attract customers.

Online Presence: Establish a strong online presence through a website and social media to attract customers and increase visibility.

Customer Service: Provide exceptional customer service to build a loyal customer base and encourage repeat business.

Upselling Techniques: Train staff in upselling techniques to increase the average order value.

Packaging and Delivery Services: Offer take-out and delivery services to expand the customer base and increase sales.