The Gizirt El Ward Sports Club is where the upper classes of Mansoura spend their weekends. Again, just ask. It is known to everyone. The club is only worth visiting to get a better understanding of the culture and fashions. There is little to do there for the tourist. Entertainment venues are rare in Mansoura. Another activity could be a visit to an Ahwa Cafe. This can be done more safely and with less hassle in Cairo however, where foreigners are not as much of a novelty.
Be aware that transportation can be an inconvenience owing to Mansoura being very crowded.