How to find St Croix events? any internet calendars or directories?

what is the best internet source, preferably an event calendar, for local events, activities and classes on St Croix?

Everything I tried is incomplete, often out-dated and/or inaccurate. During winter, I am especially interested in group singing (such as community choral groups, karaoke, sing-alongs), moving arts (such as zumba, tai chi, folk dance,  yoga, flamenco, trail hikes), live music and theater.  Is there a Facebook St Croix event/activities calendar?