How about I answer for 2 schools. One when I was about 7-11 and the other now at 25?
When I was 7-11 we trained at the local YMCA under a nurse. Her husband ran the parent school in the next city over, he was former American SF who had trained TKD in Korea IIRC. I don't remember what organization we were in, but I'm going to assume it was Kukikwan. This was mainly a family class, and we did a combination of forms, sparring, and self defense drills, although a lot of those drills we would practice for one day and never practice again (unless several months later they decided to go over that technique again). One unique thing is every other Wednesday we would bring our swimsuits and have class in the pool to do resistance training, which was pretty cool!
Our testing in that class generally involved just forms, sparring, and breaking.
I have started over as a white belt, and I am 100% sure this school is KKW. My master has spent time in Japan, was Korean SF and taught American SF, so he's got a lot of experience. He teaches us Muay Thai striking, TKD striking, Kibon and Palgwe forms, self defense, weapons, and sparring drills.
The biggest difference between my old school and this school is testing. In this school, we are tested on basic techniques, combinations (i.e. a couple kicks and/or punches strung together) in various categories, forms, self defense one-step sparring (both striking and grappling), free sparring, falling/rolling techniques, and breaking.
At first, I thought this was a lot - and it is. I also didn't agree at first with exactly how he breaks stuff down by belt and with all of the extra mini-forms we have to do. However, I've come to like the system he has in place. While in the old school we might have learned self defense techniques here and there for a variety of circumstances, in here we really practice and get the muscle memory for our techniques down pat. Every once in a while he'll throw in something different for defense - quite often something from Judo - but I really feel like I'm learning a lot.
Oh, I'm pretty sure I've seen the kids sumo wrestling in the class before mine, too.
The interesting thing about my current school is the difference between the TKD class and the HKD class. In Tae Kwon Do, I'd say it's 60% TKD, 15% Muay Thai, 15% Hapkido, and 10% a mix of Judo and others. We do forms, basic techniques, breaking, sparring, the whole 9 yards. It's very well-rounded. The Hapkido class is 99% self defense grappling, even though there are kicks and strikes in that art. I think one is more of a general martial arts class and the other is specifically hapkido self defense.
My master, while he focuses on TKD, says that he calls his school a "martial arts" school and not a "Tae Kwon Do school" because he also teaches some Muay Thai, Judo, and Hapkido.
