Most people are there to eat quickly and get back to work.
Often tables are shared due to the lack of space. The bill is always left on the table and it is paid at a cashier's desk. Hot green tea and a hot towel called an o-shibori are automatically served. Many times, menus are not given to each patron, but a general menu is written on boards and posted on the walls. Typically, there is also a showcase just outside of each restaurant that displays a model of the various dishes.