While I have always enjoyed my times at Club Sun, it does appear to be closed for good as of early 2017. I would drive by the club nightly on my way home in the spring and summer of 2017, after it closed for allegedly a short-term remodel, and saw a few signs of renovation; but little hope that it was really coming back.
I left the Islands that late summer of 2017, not to return for 18 months. When I did come back as a tourist in January 2019 I made a point of driving by Club Sun, but it still seemed totally closed down.