Either 65.2% or 75.2% of 210 attendees at Montreal (Quebec) dance events reported at least one use of ecstasy overall. This sample consisted of 126 men, 80 women and 4 who did not list their gender, ages ranging from 16 to 32, and average age 21.4 ± 3.18. Since two different percentages are provided and raw numbers are not given, it cannot be discerned which of the two figures is the correct percentage for lifetime ecstasy use. The estimated total (lifetime) number of ecstasy uses in this sample was 27.4 ± 52.3 uses. 53.2% reported having used ecstasy in the 30 days prior to survey day, with frequency of use in the last 30 days prior to being surveyed was 1.9 ± 1.9 times per month. The average age of initiating ecstasy use was 19.3 ± 3.4 years old. A large percentage of the sample (91.4%) reported at least one use of cannabis, and 67.7% reported using it for an average of 23.6 ± 28.6 times in the 30 days prior to being surveyed. At least a substantial minority of dance event attendees reported use of amphetamine and LSD, but cocaine and ketamine were used by a far smaller percentage of the sample, and only 7/210 reported any heroin use. Using age of onset in an analysis, the authors generated an age progression for drug use, which is as follows: 1. Alcohol 2. Nicotine 3. Cannabis 4. LSD 5. Psilocybin 6. Amphetamines 7. Cocaine 8. MDMA 9. GHB 10. Ephedrine 11. Ketamine. A similar analysis was carried out on 44/210 people who reported using all drugs used by 25% or more of the sample, and this produced an identical age progression. The authors conclude that MDMA is not a ÒgatewayÓ drug, and that alcohol and cannabis are the first drugs used by most people. These findings emphasize the difficulties of locating a sizeable sample of ecstasy users who are not also polydrug users. As found in several previously published reports (Parrott et al. 2001; Lieb et al. 2002), there are hints that early onset of drug use is associated with drug use problems and extensive drug use, rather than there being a set of Ògateway drugsÓ that predispose people to use other drugs.