While you sit nursing a cold one in Dusty's Desires on the Rim, three drunk guys armed with cattle prods and a super sledge will try to get the best of Beatrice, the mutant bouncer. Hoover cops will show up and break up the fight when Beatrice gets within 10% of her maximum health. If you get a couple of shots or hits in on the drunkards, Beatrice will be more respectful towards you for helping her, and you can eventually get her to tag along with you in the wastes.
Beatrice is a super mutant bouncer for Dusty's Desires Bar & Entertainment. On this night in question, there is an unruly bunch of caravaners who are staying the night at Hoover dam. They get too much to drink and try to get freebies off the hookers. Three of them decide they don't like super mutants and decide to pick a fight with Beatrice. Combat starts and two are using cattle prods at Beatrice while one whips out a pool cue. They will start to get the best of Beatrice fairly quick. Dusty would normally pull out her shotgun, but one of the other caravaners has a rifle pointed at her and told her not to move.
If the PC intervenes by fighting for Beatrice and manages to kill only two of the caravaners, that will be enough to scare the rest off. If Beatrice kills off two while the PC helped, Beatrice will still appreciate the gesture. The player may also talk his way out of the fight, calming things down with the smoothness of his speech skills. Either way, Beatrice will be grateful and ask if he can come along with the player as a CNPC. But if the player does nothing and Beatrice lives through the battle, Beatrice will not offer, ever, to join with the PC. Of course attacking Beatrice kills the whole joining thing, as well.
Finally, after the fight, no matter the outcome or if it is still going on (there will be a five round limit), Ralph Peoples, the chief of police, will enter with his posse and lay the smack down on the caravaners.