Self-selecting seats

It would be obvious to any cafe owner.

After you have something good going on, one of the simplest ways to increase the number of regular visitors is to add tables & chairs ... and couches and other little nooks & niches, into which people can adapt, fit, hang out.

People don't come back if a place is empty all the time. People also don't come back if they can't find a place to sit, each time they visit. So ... make sure the place is always packed, and have extra seating available.