I've made significant usage of the Regus benefit this morning in BRU. My flight is delays 6 hours and I've spent three of them now in the Regus lounge on the 4th floor in the terminal. It is outside security and up out of the way. Free internet service (wired or you can use their computer), clean lavs and quiet. And all included in my membership with the card. This is one where I'm pretty sure you'd need the Regus membership card rather than just waiving your AmEx Platinum, but when I showed it the woman was quite accommodating.
I wonder what other airports they have service in...
S.