Define "worthwhile."
For the past few years, I've visited some friends in Stuart between Christmas & New Years. We always play public-access courses, and I think the choices down there are pretty poor. I won't go so far as to call them all Doak 0s, but Martin County and the area around sure has more than its share of 1s & 2s. Not as much experience in St. Lucie.
A couple of weeks ago we played St. James Golf Club in PSL. I thought it was pretty good. Pretty easy to avoid condos and water, which is a big plus for that area. Some pretty good holes and decent conditions. Cheap, too. Design attributed to Warren Henderson (Arcadia Bluffs).
http://www.stjamesgolfclub.netI've wanted to check out both Fairwinds & Indian Hills municipal courses in Fort Pierce, but haven't done so yet.