To consume marijuana in a club, you must be a member of the association. To become a member, you must be invited by one of the members of the club. Learn more about this at https://weed-bcn.com/. A person must be 18 years of age or older and have used marijuana before to be accredited.
Associations of Catalunya such as CatFAC or the Self-Regulatory Federation of Associations of Catalonia (FedCAT) have created a code of ethics in order to avoid fines and to jointly support the standardization of these institutions in cities.