As a Delta skymiles member, any layovers I have in ATL are spent in the club. It is a great opportunity to stretch out and rest between flights. My last layover was 6 hours...I'd have gone nuts without the skymiles club!
I've been a member for the past 3 years. I've met some awesome people and had a BLAST. The monthly social events are the absolute greatest.
Although I spent $100 on membership, I've met some of the best people. I started my business and they supported me all the way through.
I was able to get a small business loan through the organization to open a gym with my business partner. What a blessing.