A loose chair can move. A banquette fixes seat height, depth, back angle and table overlap into the architecture, so a small error becomes a repeated daily discomfort.
Build the occupied section
Mock up seat, back, table edge and floor. Test entry, exit and server reach with people in place. This is a specialised application of the risk-led joinery mock-up.
Coordinate table lighting at seated eye level using the task-based restaurant lighting method.
Detail cleaning and access
Crumb gaps, removable upholstery and floor access should be visible on the section. Choose exposed finishes by useful life and repairability, not the untouched sample.
Freeze the approved geometry
Transfer every tested dimension to the shop drawings and procurement milestones in the design-led procurement schedule. A banquette succeeds when repetition preserves the tested relationship.