This could be interesting. The definition of drugs is any substance that changes your mental and/or physical state. Yes, this includes alcohol and even N2O.
I myself am a fan of MDMA (XTC for you noobs) and mushrooms. MDMA is basically a ticket to paradise and I've had some extreme intense and interesting experiences on mushrooms, closed-eye visuals can be bizarrely cool, too!
How 'bout you?