Coffeeshops are establishments where the sale and use of hemp and its products is legally permitted. You can find out about one of these at https://socialclubbarcelona.com/.
Their existence in the capital of Catalonia complies with the norms of the Spanish Constitution:
The right to personal space. At home, a resident of Barcelona can do anything, as long as his activities do not interfere with others.
The right to association. People have the right to join interest clubs. Marijuana lovers create their organizations, being in the legal field.