I've enjoyed the diving on the west end here in Frederiksted, the pier has a lot of different critters to check out and the water on this side of the Island has been very calm 90% of the time. Have also done 3 different 2-tank boat dives out of Frederiksted and the visibility has always been good and only 1 of those 6 dives had any current.
I did a 2-tank boat dive out of Christiansted and it was not fun because of the waves, current and bad visibility but I am told it was very bad conditions there compared to normal so I am going to give it another try next week probably.
They do have an active club that meets once a month at different bars/restaurants around the Island but I have not been able to attend any of those since I have weird working hours and they usually meet on Wednesdays around 7pm which is the middle of my work day (I work M-Th 1pm - 11pm doing remote IT work).