I received a packet from my Smith Barney broker the other day about their Accel program, which has as a benefit membership in the Citigroup Chairman Card. The packet says the card offers access to "hundreds of private airport lounges worldwide", but there is no list either in the packet or readily available on the internet.

Anyone have any information on this, if it's worth it?

I already can get into CO/NW/DL through the Amex Plat, so I'm specifically looking for AA/UA and other international carriers with this program.

Any help would be much appreciated.