This is one of those scenarios where being there to see what happens is kind of important. We had a constant clog. After years of putting SULFURIC ACID (which is what it is if its covered in a bag..) down our drain, it finally destroyed the cast iron and we had a leak.
Pipes should not clog consistantly. If they do, I would advise looking past just clearing the drain of the clog.I'd be looking into how to prevent it in the future and why it keeps happening.
Females expel a lot of hair. I would definitely have a good drain screen. If you have the screw in-pop down type plug, i would remove that and find another way to plug the tub. You cant put a screen in them. I would try to actually see the pipes. If you are fortunate enough to find the drains (maybe in the ceiling from a floor below or even a hatch in the wall..) you will find a cap with a square on it. that is called the cleanout. you can remove that cap and find lots of goodies.