I think this is mainly a problem of social norms- there are few contexts today where people assume you want to have long-form discussion without you going out o

I think this is mainly a problem of social norms- there are few contexts today where people assume you want to have long-form discussion without you going out on a limb and stating it explicitly. Asking someone to coffee is one that still exists; I do this with friends sometimes. But another alternative is to just take that step and explicitly state what you'd like to do. It might be a little awkward, but I bet many people would be receptive.