On the topic of Chiropractic, let us distinguish between the "subluxations are the cause of every disease ever" and "if I do this your back won't hurt so much" camps. The former, verifiable bullshit; the latter, might just have something going on. Too lazy to source just now, but I've read that the non-bullshit chiropractic has efficacy in the neighborhood of massage (which probably works best with an attractive practitioner).
To conclude: "You know what they call alternative medicine that works? Medicine." - Tim Michin.