I've seen the same technique used in a few movies recently. I think it's kind of cool, if done right and not overused.

With my own work, I had a chance encounter worked out for a scene with two characters from separate stories but it developed into another, then another and another. I realise I can't have them all in a single story, but instead am working on a single instance where two characters are at the same party as slaves. One is being used along with a few more slaves for a sadistic game of cat and mouse, while the other is a relegated to lowly beverage serving/sexual-toy sissy-maid.

I hope to give the feeling of the same party from two very different, yet similar perspectives. Each character will be doing their own thing so to speak, but the same events and location will be constant in the chapter.

I really must get to brain-storming ideas again, I have high expectations for this chapter.