I recently studied ancient Greek extensively in the Boston area. I was well aware of the living language community--people that speak and write Greek/Latin as they learn it and not just read it--and even joined some seminars, but these are all not for credit and are usually run by non-accredited institutions. Since I was in a masters program, I needed the credits for my language work. And I realized, it is nigh impossible to learn Greek as a living language in an academic settings. It's a real pity. Ancient languages are largely taught to pass the advanced language exams like the comps. If you want to learn it as a living language you have to step outside the academic mainstream.
Edit: clarify the credit thing.