Minor league baseball is known for its theme nights, promotional giveaways, and on-field antics that keep the fans entertained all game long.But at a time when this has become the norm, some want their baseball without a side of music blaring and the mascot doing donuts in the outfield on an ATV.And that's exactly what the Sugar Land Space Cowboys, the Triple-A affiliate of the Houston Astros, will do on Aug. 18 when they host their first-ever "…