My first experience was random, when I tried a new, legal LSD variant[1], during the end of the pandemic, summer 2021.
I tried first ~40µg, while still finishing work (code).
Didn't feel anything so I took another 40 and then went dancing two hours later. At 80µg the LSD was just below psychoactive, so that dose was too high, in retrospect. I now use 40µ and that is perfect for me.
The only indicator I had, after the night, was external. Three followers came to me, out of the blue, and told me: "you were my best tanda tonight, thank you." (A tanda is a block of three-four songs danced together, before you change partners).
That struck me as odd/very surprising, at the level of dancing I was at then. A comment like this was something I would hear once-twice a year, if lucky. But three in one night?
After that the praise kept coming from other tango people I danced with for years before, i.e. they felt the change.
That's when I started experimenting with it and it has just become another tool to improve since then.
People who disregard this I tell to talk to dozens of dancers who know me for years.
They didn't know about what caused it. Yet they saw/see and felt/feel the change in my dancing and particularly musicality (which was, until then, my biggest struggle).
[1] LSD.shop
Both feel not noticably different from pure LSD I took years before.