Every age should be welcome and alcohol ain't no reason to keep youngsters out.
There are other ways to deal with the liquid.
Everyone should be able to visit concerts, i'm so glad Holland doesn't have such stupid rules.
In casino's, striptease and sex clubs it's 18+ and that seems a reasonable ethical rule to me,
but age limits at concerts go beyond my comprehension.
Musical cultures must be explored, not censored.
The 21 thing in the states means that 19 and 20yr olds, who are adults, get royally screwed.