When you're there and they're smoking, call the cops. When the cops knock on the door, YOU go open the door and let the smoke waft through it. Be prepared to be arrested with your 'friends' depending on the situation.
The last line is why it's suggested you dump these fools.
Inevitably, with friends like that you'll have weed or paraphernalia in your car, or we'll hear the ubiquitous verbeage from your lips - "These aren't my pants!!!!"
Of every one hundred men, ten should not even be here. Eighty are nothing but targets. Nine are real fighters, and we are lucky to have them, for they make the battle. Ah, but the One... One of them is a Warrior... He will bring the others back.
"Wrong door, buddy!"
Let no man's ghost say my training failed him.