A few friends told me about this so I thought I'd pass this along to those looking for a public lake.
Robinwood Lake is open to the public Memorial Day through Labor Day. It has a beach area, high diving board and a slide. I've never been so I don't know how big the lake is or what the admission price is. The
facebook page has pictures. The address is 2221 Robinwood Rd Gastonia, NC, 28054 (704)867-9111.