I guess I'll just start reading at the coffeehouse. This has been suggested before and I have no idea how it leads to meeting people, but fair enough. I'll give it a serious run.
by becoming a 'regular' at an establishment, the employees and other regulars become familiar with you. these can be good starting points for new friendships/relationships.
whats the difference in this and you taking a martial arts (example used elsewhere) class together with a group of regular people? not too much. you just interact less in a coffeehouse.