Combine a table, table cloth, air conditioning unit, and transparent plastic “curtains” usually meant to contain heat within a space (as opposed to cold) and you’ve got an improvised climate control system.

Disassemble and place AC unit on table in corner on mild days.

The ability to create/impose boundaries upon a space using flexible/temporary/inexpensive means, and how that increases the functionality/desirability of being in that space (a restaurant, in this case).