While unpacking this morning, I found a bag of anti-static gloves we got from Ali-Express that don't seem to actually have conductive thread at all but do seem to be made of anti-static material. Since this seemed like it would be better and more reliable than the anti-static bag, I got out a needle and thread, conductive thread, and conductive fabric and went to work.

After a really small amount of super simple stitching, I ended up with something that fit my hand perfectly and worked really reliably for gentle pressure. (Every time the value goes into the triple digits in the serial dump below, that's a tap.)

This is a super and super reliable way to make a small, wearable chorded keyset that you can activate by pressing your fingers lightly and subtly into a table, your leg, etc, without having to wear a series of odd rings or other contraptions. Next step: entire glove.