Back in olden days, 1940s, pot was a jazz thing. Gene Kruper got busted once. In Tucson, in the early 60s, if anyone wanted to smoke they had to go to South Tucson to by a reefer (the other side of the tracks - so to speak). The Arizona Pioneers Historical Society museum had a little pile of smokes in a glass case said to be confiscated from Chinese RR workers in the 1880s. I believe someone once told Dylan he should smoke before he performed and he said he'd tried it once (before performing) and it threw his timing off. If you're serious about your music no magic substance will make you play better.