Hopper Bench is available in two sizes, seating three or four people. The galvanised steel legs are perfect for public spaces thanks to their extreme durability.
Hopper bench needs a floor fastening or needs to be mounted on stabilizing supports. Use suitable bolts or screws from a DIY store (depending on the material your terrace is made of) and combine them with the floor-fastening set if you don't want to move it around in the future. Otherwise, go for steel plates as supports for your bench.