great if they are free ;-) sometimes dont bother my ass
KLM/AF Petroleum Card - can get this if you work in oil Industry and fly on oil routes once a year - KLM - so get into their lounge in amsterdam and they will give yu 15 Euro to go spend at Irish Bar if your connection is more than 3 hours (this also lets you queue jump at boarding etc )
Amsterdam - Soups, Spaghetti, fruit, biscuits - Draft Beers on tap, wine, champagne, gin, vodka, whisky etc etc
Paris - not the best - free spirits, normally walk out with orange juice and crisps
Aberdeen - Servisair - so so but nice to have a Gin & Tonic @ 6am but not been ther so often recently cos lost my Gold Card
Personally - I wouldnt pay for lounges - more often than not you are short on time to get benefit, but 3-5 hour stayovers in Amsterdam its handy to have a comfy seat - although pisses me off you have to hassle the KLM staff to get the 15 Euro voucehrs cos they dont know the Petroleum Card Programme