I don't think it's called Pumpkin Park, but I'm not sure. It's across Westheimer from the park south of where they had a giant pumpkin patch during October. So maybe?
I've since had a few sessions at Homer Ford Tennis Centre in Third Ward. It's a great little place, $2.50
Racquet: Custom Bio Max 200G (~345g) + Sensation Control 16 @55lbs