"Service users' sociodemographic data and drug use profile are similar across countries. Data show that the rooms reach the intended target groups of long-term addicts, street injectors, homeless drug users and drug-using sex workers and are thus facilitating contact with the most problematic and marginalised drug users. Demographic information also shows that these services can be successful in reaching long-term drug users with no previous contact with treatment services."
Source
Hedrich, Dagmar, "European Report on Drug Consumption Rooms" (Lisbon, Portugal: European Monitoring Centre on Drugs and Drug Addiction, February 2004), p. 41.