Harm reduction organization focused around club drugs, mainly ecstasy.
You can mail in ecstasy pills and they will lab test them for you, and post the picture and what's in them on their website so you know wtf you're ingesting.
Person 1: I love dancesafe!
Person 2: Yeah, dude! I found out that E pill I was gonna take had hella ketamine in it! I'm glad I tested it!