8 ball rules in Southern Iowa, which are bar rules because that's all that existed here:
Nothing spotted as tables were coin op. 8 ball on the break was an instant win, unless you scratched too and it was an instant loss.
BIH in kitchen after opponent scratches. If your balls (or the 8) are all in the kitchen, tough luck, you have to bank at them. If your opponent misses or fouls... tough luck, play the CB where it lies.
Everyone was expected to make an honest effort to shoot or hit a ball, no safety play was allowed (and most never knew it existed). If you didn't try to hit a shot in, no matter how hard of a shot, it was dirty pool. If you played an obvious safety, it was dirty pool. Ribbing, arguments or fights ensued depending on if you knew the person and how drunk everyone was. I was a kid in the 80s and never saw a fight, but did hear people screaming at the top of their lungs and walking out on a game.
If you scratched while shooting the 8, you lost. If you just missed the 8, no biggie, fouls other than scratch really didn't exist. Your opponent would just shoot where it lies. Basically cowboy pool, you had to shoot and no funny business or you were a dirty player. A dirty player didn't get games after they displayed a pattern of dirty play. No one wanted to be known as a dirty player and it was a huge insult, questioning their honor. This resulted in most people playing as honorably as possible, but sometimes people would try to fake a good attempt and miss. It sounds barbaric, but it was actually fun, just another mental aspect to the game and an opportunity for sharking. Sharking was always ok as long as you didn't take it too far. Dropping a cue on the floor was too far, but asking them what they were shooting at wasn't.
The game was mainly call pocket unless you are banking or kicking, then you say 1 rail, 2 rail etc. You could agree to just play call pocket but most preferred calling rails even if only playing call pocket. Most people used to call caroms off other balls or combos. Matches between friends or people you respected were usually just on the honor system unless it was some kind of touchy shot, then you called what you were doing, but straight in shots or simple one rail banks you didn't call.
This was basically the formal rules of the game around here. If you played someone new of from a town over you both used the same rules. I was born in 80, but the bar players here still play the same way. The rules aren't really formalized, but spread through word of mouth and how your parents/pool mentor taught you to play.
Now me, I prefer "league rules" or in other words real rules like BCA with no funny business. Bar pool is fun at times, especially if you've all been having a few drinks. Less thinking when BIH isn't a thing and more aggressive shots. You can still call someone out on dirty pool and most learn to try all offense when reminded that dirty pool isn't allowed. 2 way shots become very important but an honest effort is expected.