I wanted to train the scene of a fantasy slave auction with a crowd of shadowy people in the foreground, bidding on the heroes and heroines of fiction - but it's pretty complicated subject and I didn't get it to work right. Perhaps you can get something out of it? (Going by some examples of the community - by adding some negatives, and an interesting style that 'beautifies' some of my Lora's faces - it seems not as un-work-able as I first thought).

In addition to the activation-word "b1dcr0wd", you might want to add "stage", "slave" and any number of people, to populate the scene. "1Girl, 3Boys, 6+Girls" - you know the drill. Strength 0.8-1 seems to work fine. CFG-Scale 7 works as well.