ASV is always worthwhile (I am an MBO member and ASV)
A lot of MBO members are both MBO and ASV. I mention MBO as they have weekly nights at the observatory even if my location means I only get there a couple of times a year myself. If the ASV new astronomers group is re starting they would be a good place too though I am not sure how often they typically met (I had been kicking around for a few years before I joined the ASV so I never became part of the new astronomers group)
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