All of the US legacies have a CC that includes lounge access. In that $450-500 range of course, but if you hit it with a good sign-up bonus I suppose you can justify it for a year or two. We picked up Citi AA cards last year with 100k bonus per card. I don't use the club quite enough to justify it every single year, but I probably will have made 12-15 total lounge visits before the annual fee comes up again and I cancel.

I also have A3 Gold...kind of on the fence if I'm going to renew it. Aegean recently made their renewal process *slightly* tougher (still not that hard), but it means I have to commit more earned miles to the A3 account, which I hadn't really planned on.

In some parts of the world, the freebie lounges that come with credit cards and other clubs aren't the best lounges. I had one of those generic lounge passes...got it for free one year with a few complimentary visits...and it was always a very basic lounge - not even up to the standard of a typical U.S. AAdmiral's or United Club. If your 180 quid just gets you into those general lounges (as opposed to the lounge of the alliance you actually fly), it's probably not worth it.