Are margins on coffee good enough to support this long term? High end coffee is quite expensive as is square footage in small trendy coffee shops.
I suppose the odd abuser who parks their butt for 3-4 hrs a day in the coffee shop can be dealt with in other ways e.g. they must order food to keep a seat. If they are forced to walk to the coffee shop each time they will likely max out at a few coffees a day.