I don't think those have much in common. You know the bouncer just wants to see your ID and won't bother you after that. They're not trying to push you into sig

I don't think those have much in common. You know the bouncer just wants to see your ID and won't bother you after that. They're not trying to push you into signing up for an annoying newsletter you don't care about or to buy something you don't want. Also, in many states, just looking like or actually being over 21 isn't good enough. The liquor license people require that every person in the bar or drinking be able to prove with a valid ID that they're over 21, no matter how old they look or actually are. They're not checking that you're over 21; they're checking that you have a valid ID on you that proves you're over 21, because they get in trouble if you don't.