Hi, the pool in the complex is not yet open. I know that Romanber want to try and open it for this summer - as well as benefitting those of us in the development it would help sell the remaining properties.
There is a good public outdoor pool at the Meson de la Molinera hotel but it probably won't be open in March - it wasn't in Feb. What should be open during your visit is a the indoor pool on the west side of Jerez which I believe is suitable for adults with swimming lanes - but it's not a 'fun pool' for kids.
The local bars and restaurants are open all year round.