cant see this ever being successful as a minimum price under competition laws especialy if there were differences between supermarkets and clubs
as a tax it may be doable
but in either case i cant see it stopping the problem drinkers
they take hospital hand sanitizer for goodness sake to sake thier desires
see
http://news.bbc.co.uk/1/hi/england/7920576.stm
as to clubbers you more than likely just see an increase in people taking in pre bought imported drink or just using drugs to increase the effect
better would be enforcing the laws we have that are mostly ignored
- It is illegal to serve alcohol to someone who is drunk
- It is illegal to allow a customer to become intoxicated on your premises
- It is illegal to serve customers under the legal drinking age of 18.
there should be at busy premises 1 drink per person at bar rule, it may cause cues

give them longer to sober up though lol