In the dark you can take too much, pay attention to the dosage if you want to consume in the darkroom. Don’t give pickpockets a chance and only take what you really need. Valuables can often be left at the bar.
Take care of yourself. Don’t do anything you don’t agree with. If you feel uncomfortable, leave the Darkroom.
Be respectful. Don’t ask others to do things they don’t want to do. No means no. Don’t take advantage of someone who’s obviously on drugs.