There are many different types of chairs that are commonly used in restaurants, depending on the style and ambiance of the establishment. Some of the most common types of chairs used in restaurants include:

Dining chairs: These are the traditional restaurant chairs that are used at tables for dining. They are typically made of wood or metal and may have cushioned seats for added comfort.

Upholstered chairs: These chairs have a padded seat and backrest and are often covered in fabric or leather. They are comfortable and stylish and are often used in higher-end restaurants.

Wood chairs: Wood chairs are classic and timeless and can be found in a wide range of styles, from simple and rustic to more formal and elegant. They are often used in both casual and fine dining settings.

Metal chairs: Metal chairs are strong and durable and are often used in outdoor settings or in restaurants with a more industrial decor. These are chairs that are designed specifically for use in outdoor dining areas. They are often made of materials that are resistant to weathering, such as plastic or metal, and may have a more casual, relaxed design.

Plastic chairs: Plastic chairs are lightweight, inexpensive, and easy to clean, making them a popular choice for fast food restaurants and other casual dining establishments.

Bar stools: Bar stools are tall, narrow chairs that are often used at counter-height tables or bars. They are commonly found in bars and pubs, as well as in some restaurants.

Lounge chairs: These are comfortable, upholstered chairs that are often used in more casual or relaxed restaurant settings. They may have a reclined backrest or be more upright and are usually designed for longer periods of sitting.

Highchairs: These are small, portable chairs that are designed for use by young children in restaurants. They are often made of plastic or metal and have straps or harnesses to keep the child secure.