and, of course, in Iran drinking age is N/A, but in Lita it is 16! 18 seems to be the most popular choice all over the world (except where it is prohibited or no age limit).
In US, according to Wiki, it is still 18 in Puerto Rico and Virgin Islands. Given that Vashti was married, she got to be a Puerto Rican! Also, in Ohio you can drink with parents and in NJ underage drinking only gets a warning. Not sure whether the latter needs to be revealed or not.