I already did. Teams don't do it because "everyone does it". Teams do it because it has a significant and measurable impact on team performance at a low cost relative to the annual budget. What is the cost for a season, perhaps $25,000 for six home games? Furthermore, that money flows to the local community.

The "research" was done a generation ago, when no teams were doing it. Teams experimented with it, and found it to be very beneficial, so others followed, and it became the norm. Since the research isn't current, I agree that you can ask, "has something changed in our culture today that would make it not be beneficial today, where it was beneficial a generation ago?"

I would agree that no one probably did a formal study because the difference was obvious. Why is this even a question? Do people really want to go back to curfews and having coaches running around to dorms and housing doing bed checks? With 110-120 players, that's a lot of rooms to check.

At this point, I have to presume you're trolling, so I'll go with it. OK, none of these are obvious:
Players play better if they don't party all night the night before
Players play better if they get a proper night's sleep
Players play better if they eat properly the night and morning before
Players play better if they are relaxed and loose, and not crammed in a bus for an hour before a game
Players play better if they are relaxed and focused on the game the night before
It's easier for the coaches to monitor all the players if they are in one place rather than scattered on and off campus
Staying at a hotel creates a generally positive atmosphere, whereas bed checks and curfews create a generally negative atmosphere.
If you try to monitor a team via curfews and bed checks, you absolutely will have some players violate them, and therefore you will have players suspended
Teams play better if they have the whole team, rather than having a number suspended for violating curfews

I'm surprised a coach 50 or 60 years ago didn't have his team sleep in jail the night before games.

Not trolling but asking a question? What Hotel (HI Express or similar) that they stay in has local ownership?

My dealings with the Hotel management at all the major places trying to work out a guaranteed rate for 20-40 nights I would be in Athens directed me to out of town owners save for OU INN.

I agree with your list of benefits and can think of nights where basketball players were out past curfew,staying at a hook ups place or were at private parties past curfew or got caught and serves suspensions for curfew. That would take care of that for sure and I wonder why basketball teams do not do the same. Unless the sheer numbers in football create the need to do this. I do not know of a single college hoops team that does this prior to home games whereas most FB teams do...

Several of the Athens hotels are owned locally. There is one family that owns them, I'm currently having a brain cramp and can't remember the family name. Can someone else help?

They just built a new HI Express here. There was one principal investor/owner with many hotels across several states, but local people were solicited as investors as well. The Athens hotels may have some similar kind of arrangement, so it's not actually controlled by the guys in Athens, but they can claim "local ownership."

Here it is, borna:

http://www.sjbmanagementinc.com/index.php?

I'm sure that other sports would benefit from it as well. Like basketball, Volleyball involves a much smaller number of players, so it probably is easier to manage without resorting to this. I do think it's possible that in the years ahead we will see it become more common in other sports.