Agree with you on this one. In this situation it would be hard to make it 21+, but I like how Trader Sam's is adult only (21+) after 8 p.m. But to your point I am shocked at the number of parents who plop their kid in a bar stool and then order a drink. I guess Florida doesn't have a law about under 21 sitting at the bar. I've witnessed parents all over Disney have their kid belly-up to the bar. My parents never did that for us. Several years ago I was in St. Louis and the bartender was explaining to a very upset Dad that his child could not sit in a bar stool at the bar that it was against the law.
But you may want to check the new bar out, Disney does offer a lot of fun mock-tails for those that are non-drinkers. So maybe they will have some fun fruity less-spirited concoctions