“The Rebbe made a rule, known as “The Gzerah” forbidding anyone under 40 of consuming more than 4 Kelishkes, or a Reviis of mashke.”
1) drinking 4 shots of vodka makes one legally drunk.
2) A lot of bachurim don’t follow that
3) having alcohol at most, if not all, events, and the alcohol is highly consumed translates to “alcohol culture”
4) mashke does not mean alcohol. It means liquid. If your default liquid is alcohol, then you have a alcohol culture .