Lounges have become one of the primary reasons to own a premium credit card, but the lounge wars aren't just happening in the airport. Whether it's American Express at Coachella or Chase Sapphire Reserve at the PGA Tour, these hospitality spaces have become increasingly important to card holders paying annual fees approaching a thousand dollars per year. >> The economics [music] of things like lounges are really interesting because economists would think of those as more of a network [music] good.These loun ...