What size table seats 4 people in a restaurant?

“A 36×36-inch square table is the standard commercial 4-top for full-service dining. For casual or café service, a 30×30-inch square or 36-inch round table seats four comfortably. For fine dining with full place settings, a 36×36 or 42×42-inch square table is preferred. A 30×48-inch rectangular table also seats four to five people and offers flexibility for combining with adjacent tables.”