Aside from our lack of EMV, things aren't done differently in the US;
don't take Adam's misunderstandings as authoritative.

In places with chip+pin it's much more common to arrange payments so
they can be done in one transaction. At restaurants, for example,
they typically hand you the card terminal so you can stick your card
in, enter a tip if you want, then your pin, then it says yes or no and
you take your card out.

The only places I can think of offhand that do a separate authorization are
hotels, where the charges are likely to happen over multiple days.

R's,
John
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