And wouldn't everyone over 18 be of age to gain entrance to a bar? I've only seen once case of some one younger than that pledging.
In some states, you have to be 21 to even get into a bar (even if you're not drinking) unless it's a TGIFriday's type of place, and even those often have rules about people who are underage (i.e. cannot be in certain areas at certain times).
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It is all 33girl's fault. ~DrPhil