Lufthansa. My husband and I took it in 2003 so this is ancient history, but FWIW: we were bumped from a flight from FRA to LED (St. Petersburg, Russia) on our honeymoon. I asked if they could let us use the lounge. She called the lounge. No, it was too crowded already. (I do know enough German to know that she was correctly reporting the conversation with them.) The flight we eventually got left over an hour late- they held it to wait for connecting pax from another flight. (Never in my life have I had a connecting flight held for me. Jealous? Heck, yeah.)
We did get $600 worth of vouchers, whcih I eventually sold for something like $400 (they were transferrable) but it wasn't worth it to lose 4 hours in St. Petersburg. What I found particularly disenchanting was all the Lufthansa ads I'd seen/heard touting their on-time record.