Location groups
In the case of a restaurant where the customer orders food from a table, users can create location groups and locations within those groups, e.g. a table (location) within an area of the restaurant (location group).
Location groups are registered under Sales > File administration > Location groups.
Names and numbers of the location groups are a choice of the user but have in mind that the order from left to right are a numerical ranking and it should be most convenient to place the largest or most common area furthest left.