Denver, Colorado has previously decriminalized magic mushrooms.
My wife and I tried mushrooms (well, the non-fruiting-body things they had) in Amsterdam and I didn't notice much. She, on the other hand, stopped her OCD ticking for maybe 9 months afterward. It was so life-changing for her that I've been planning a trip to Amsterdam just so she can take another dose.
Obviously I have friends who grow too, but you don't need that.