As of yesterday (11/23) there is a SEN lounge at BKK (shared with UA) and they asked to see a BP in addition to the SEN card. The lounge is small, no food to speak of and it is more crowded than anything you might have suffered trough at FRA (there is a LH 747 and a OS 777 leaving BKK at the same time).

I went to the TG lounge in T1 which is exellent in all aspects. Huge, airy, free internet, great lounge chairs for a nap and even a small smokers room that isnt too drepressing for the addicted crowd. And on top: a bar that features 3 different gin brands (Gordon's, Bombay Saphire and Beefeater). Try to find that at LH's lounges!

Only drawback: quite a walk from LH's gate at T2. The other TG lounge open to *G closer to T2 isnt that nice, but still better than LH's joke room.