A bench is a piece of furniture

Furniture

Furniture is the mass noun for the movable objects intended to support various human activities such as seating and sleeping in beds, to hold objects at a convenient height for work using horizontal surfaces above the ground, or to store things...

, on which several people may sit at the same time. Benches are typically made of wood, but may also be made of metal, stone, or synthetic materials. Many benches have arm and back rests; some have no back rest and can be sat on from either side. In public areas, benches are often donated by persons or associations, which may then be indicated on it, e.g. by a small plaque

Commemorative plaque

A commemorative plaque, or simply plaque, is a plate of metal, ceramic, stone, wood, or other material, typically attached to a wall, stone, or other vertical surface, and bearing text in memory of an important figure or event...

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Often benches are simply named for the place they are used, regardless of whether this implies a specific design.

• Park benches are set as seating places within public park
  Park
  A park is a protected area, in its natural or semi-natural state, or planted, and set aside for human recreation and enjoyment, or for the protection of wildlife or natural habitats. It may consist of rocks, soil, water, flora and fauna and grass areas. Many parks are legally protected by...
  
  s, and vary on the amount of people they can seat.
• Garden benches are similar to public park benches, but are longer and offer more sitting places.
• Picnic table
  Picnic table
  A picnic table is a modified table with attached benches, designed for eating a meal outdoors .-Uses:...
  
  s, or catering buffet tables have long benches as well as a table.