"Consumption rooms reach a population of often older, long-term users some of whom have had no previous treatment contact. Services appear particularly successful in attracting groups that are difficult to reach. No evidence was found to suggest that naive users are initiated into injecting as a result of the presence of consumption rooms."

Source

Hedrich, Dagmar, "European Report on Drug Consumption Rooms" (Lisbon, Portugal: European Monitoring Centre on Drugs and Drug Addiction, February 2004), p. 41.