A question for all you regulars with Discover cards --probably a stupid question, but how exactly does the Discover cardholder line work? Do you just need one person in your party with a card, and is there a max party size? Do they swipe the card, write it down, or just look/glance at it? Seems like a cool perk -- just curious if it's as simple as it seems (based on previous comments).
Background: I have a Discover card that's not been activated for an old account that's being paid off. Would prefer not to activate it if possible (one more thing to lose track of), but would do so if that's what's required to use the line (i.e. they scan the card or the like).
Thanks!