On my only visit to the States in 1968, as most of our student party were under US drinking age (though over UK drinking age), folks kept offering us cola or root beer. Those of who were over 21 still kept being asked for ID in bars, which still rankles! I've never drank either cola or root beer (what the hell was that?)since.

RtS
Little ole wine (or real beer or Greek brandy)drinker me.