It isn't cutthroat.
You break a rack of 15.if you have 5 players in a game you create an order of play, by using a 5 man lag for example. You can shoot any ball in any order. Each player has for example 3 chances. If you miss or foul you lose a chance. Once you lose 3 chances you're out and the remaining players continue. You just keep racking the balls until 1 player is left. First, you have to able to pot and make shots so it tests your shot making. Next it can be quite tactical because you have to think about the next shot and n9t leave your opponent something easy... So positional play and tactics play a part. The better players usually end up left, especially in larger games of 10 or more people.
I normally play with friends for who buys the next round or what ever. You can add things like the 8 ball gives you an extra chance or you can only pot stripes first then solids after or even then odd. It's quick, fun and like I said the better players always make it to the end especially with a larger field.