There is probably an expiration date on that pass. They are pretty strict about who gets into the Metropolitan Lounge.
Legacy is not nicer. No free food. No open bar. You get passes based on level
They usually allow a coupon if you can get one or if your in a sleeper. I dont know about business class. The Legacy lounge there i think is nicer and its $20.00 per day/visit. Free food and drink. Legacy does not have showers though.
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