LoungeKey is a way to access airport lounges for free if you have a special bank card. They also happen to be the filthiest and sneakiest scam artist that I know. Staff from lounges participating in their program constantly lie and should be ashamed of themselves.
In London Luton Aspire Lounge, after staff swiped my card several times, I was told that it wasn’t accepted. Then they tempted to charge £150 for a free service.
After visiting a lounge in Moscow Vnukovo airport, where staff were overenthusiastic about telling me that my visit is free, I got charged $96 from a location in an American forest five days later.
All of this happened despite me never confirming any transactions in any way.
Don’t use LoungeKey and any of the lounges affiliated with them.