Short answer is all of them for me. At least the ones that I'm aware of. They each have something to offer; good and bad. You have to decide how much you want to tolerate and how much value each offers.
Long answer, RC is great for all the articles, stickies, and the vast user base which has a lot of added value. MR is the most active in terms of local users and because of the local user base members can relate to local events as they affect each other in the hobby.
LIRA is a decent club that is active on both forums and also have a forum of their own. They also have monthly meetings but not until October. I joined up a while back but never attended a meeting due to scheduling conflicts.
I think there is also a reef club in Ozone Park Queens which is very active. I would like to join up that club too since my home is in Ozone Park and I'm in the process of setting up a tank there as well.
In summary, I'm new and had no idea where to start and in a couple of months I decided to explore all avenues. Eventually I will decide which one I want to stick with or which one has the best network, and is a good use of my time. Or maybe I just stick with all.
I encourage you to do the same investigation.