A few years ago I was offered a Mastercard Platinum by my bank for 100 Euro/year. I wasn’t that interested until I read, there is a Priority Pass Prestige included. This card allows you unlimited access to 700 lounges at almost every major airport. You can bring guests for 20 Euro/visit. At our home lounge Hamburg that makes every departure a pleasure with a light snack, some glasses of wine and a great view of the tarmac.