In the day it was mainly parents with children or the occasional remote worker, and as it hit 5pm more people would come in for beers - though they served coffee and snacks all night.
One time we were in there having a couple of coffees and chatting while my son was tiny and sleeping - I apologised to the owner that we were having another round of coffee and not drinking beer. He said not to worry - for every coffee we drank he made about £2.50 profit, for every beer it was about 50p.
Really opened my eyes to the potential profit margins at various businesses, especially those that can cater to very different customers at different times of the day.
IIRC, Coca Cola syrup for fast food restaurants is on the order of pennies for a gallon of soda.
Kava is a nonintoxicating plant with alkaloids that improve mood and enhance sociability.
The kava bar a fantastic place to sit by yourself and easily fall into a conversation with other people at the bar or the kava-tender.
I do think kava is illegal in some countries, which is unfortunate, and being that it grows on pacific islands, it's probably rather hard to import for most places. But a wonderful plant and wonderful concept.
Milkshakes are one of the most popular things Starbucks sells.
Though for unfathomable reasons they insist on adding coffee to almost all of them, as if that were the reason people buy milkshakes.
Plus alcohol is (perhaps understandably) taxed so heavily.