The seating issue is a tough call. I worked in a fabulous funky independent coffeehouse for 13 years. It was very close to a college. There was a bus stop nearby and oftentimes regular customers would wait for the bus, or wait for a ride, inside the cafe. Sometimes those people had ordered something earlier in the day, or they were regular customers, and they just needed a place to feel safe and to be with other people. That was especially true if it was dark or rainy outside. Another common thing was when regular customers brought in their work and sat at a table for hours. Fortunately, we had a lot of tables at the cafe, so it was fairly unusual for a customer to not get a seat. But it would happen on crowded days or nights. The very nature of a coffeehouse is that people hang out there.

I guess if I worked in a cafe with only 6 tables I'd put a time limit on seating...but it would offend regulars, and that could be a problem.