IDPA club to which I belong is one of the few "teaching clubs" in the group and we were the first to hold an officially sanctioned shoot east of the Mississippi River. In fact I was the first shooter run at that shoot and in honor of that, I ran the course with combat JHP's in my gun...what I actually carried on the street.
IMHO, IDPA is the best possible and safest preparation for realistic street situational training.
The club I shoot at is just starting and it's difficult to get the competitors to shoot from a concealed. I do and I think I'm the only one and I really don't care what the scenario reads. I shoot my street leather except for using lead for the plates. I still use the Commander that has the faulty extractor. So I'm not going to place first, second or third. Tough. What I should do is start using my street gun with the ports and just get disqualified for using it. Our score sheets allow me to have a copy and I can bring the copies home and compare what I did.