A San Shou gym would be like an MMA gym. No it wouldn't be training MMA techniques
It would be a gym dedicated to the sport of San Shou. This one of the reasons the web site set off alarm bells. They say they are a San Shou gym, but then they are adding traditional elements to it (they say). It just doesn't work that way.
I didn't mean family as in related by family. I meant the atmosphere. 47MM, some family systems do indeed award sashs and ranks. It is a tool like any other. Some schools use it, some schools don't. Saying a school is not a family school based upon whether they award sashes or not is incorrect and bad advice to someone who might be looking for a school.
I don't care for splashing hands. I don't think its as effective as using..ack, can't remember the Chinese term for it, short, explosive, penetrating, power. While splashing hands incorporates this principle, the practitioners rarely have it.