One-day ad-hoc sitz in Boston, MA

Hey! Are you aware of joint events near Boston, MA between an orchestra and a chorus to sing musicals (or parts of musicals) on a regular basis in a non/semi-professional fashion?

I was enjoying this in London as monthly 1-day private rehearsals (https://www.lmto.org/sitz/) and I'm not sure I'd find this in Boston. The name is apparently common in the field (https://en.wikipedia.org/wiki/Sitzprobe).

Note: I'm an amateur chorus singer

Cross-posting from https://www.reddit.com/r/Choir/s/d7TDv6jTXk