Exactly. PNP or using meth and other drugs and having unprotected sex with friends, random people, whoever has been happening for decades ever since people first started using amphetamines/meth, or going to bars and getting drunk and hooking up with people.
In the United States at least, some sociologists/sexologists seem to think that PNP means only using meth, and that it's mainly only done by LGBT people who live in urban areas; but it's unprotected/risky sex with anyone and lots of people do it while drunk or stoned, or on other drugs besides meth, and people all over do it. When I lived in a completely rural area people did it there; but it's as you said meth and other drugs are everywhere.