I joined an executive course that has a large practice facility that is open till 10pm during the weekdays and 11pm on weekends. The ability to practice after my daughter has gone to sleep gives me the chance to spend quality time with her and then head out and work on my game (wife is ok with the late night practice as well). Although the facility is great the large grass range is not what I would call fairway material. In fact it is manicured so that it is like you are hitting out of rough. Fluffy lies, clover in spots etc. Remember this is an executive course that I joined just so I could work on my swing in the off hours, they are not using Toro Reelmasters to cut the turf. So I choose to use the mat facility as opposed to the "rough style" range. My question is am I hurting my game at all by using mats as opposed to hitting off of grass?