8 Ball has been around a long time. I play down at the local Senoir Center here in St. Pete Fla aka (Wrinkle City) and all of the guys that I play with are over 55, most are in the 65-75 range, and not one of them plays Straight Pool, they grew up playing 8 Ball, they say Straight Pool was a game "Dad" & "Granpa" played.
These guys came here from different cities, so the rules they grew up with vary.
Here is the Rules they all compromised on:
1. Loser or New incoming player Breaks.
2. If you pocket a Ball and scratch the Ball gets spotted and the other player gets the Cue ball in the Kitchen.
3. If you Break and make a Stripe, you are Stripes, if you make a solid, you are solids, no choice.
4. If you Break and make one or a few of each, then you have your choice.
5. You must at least "Hit" the 8 Ball when you are shooting at it. If you miss it, you lose.
6. Some of the guys will spot the last Ball, even the 8 if it is in the Kitchen and you scratch on your last shot.
7. Slop or not called Carom shots count.
Only one guy likes to play "Ball in hand" he used to play in bar leauges, he also likes a good game of 9 Ball.
The rest of them look like this

When he asks them if they wanna play Ball in Hand.