It sucks that you caught some flack in the manner that you did, it seems as though the pro could have managed the situation a bit better. That being said, you should have brought some slacks with you or notified the concierge that you guys were wearing jeans so he could act accordingly and either get you some slacks or find a course with a relaxed dress code. I don't think the pro was judging your character nor do I think he was thinking you were trash. I think he was trying to protect the integrity of his club and it's members, at $450 a pop to play I would have bought some slacks regardless of how the pro acted, I would have felt guilty.