None that people consider a sport. But whenever there’s a four square court I play four square (I consider four square to be a sport since there’s four square championships in Maine).
My school just got a four square court (we wanted one) and there’s a lotta stuff wrong with it. The squares are too tiny, the numbering is wrong, etc. Because the numbering is wrong (well it’s a variation but different from what I’m used to) square 4 serves to square 2 instead of square 1 like what is proper. (Square 4 always serves diagonally)