http://mashable.com/2015/02/05/high-there-app/
If you live in Colorado or Washington (or anywhere in Europe) you can now search for and date your fellow Cannabis users using High There (the pun is intended-that actually is the name of the product).
Are we really that compartmentalized that we need dating sites for what drugs we use? What's next what beer brands we buy? What condoms we use?
They say nothing about that and it is illegal to carry even small amounts in most places so I highly doubt it.
An app based on beer brands would be cool. Guys with good taste in beer generally also have good taste in other areas and above average sense of humor. I would use it.