The LH lounge in DXB isn't too bad - infact, it's quite nice during non-peak hours. I used the lounge with my dad recently, he was *G on SIN and was let in without hassle; whereas I was LH SEN, but on MU to KMG - and asked whether I was allowed in (even though I really only had access to the AF/Marhaba/Whatever lounge E+ is entitled to); she was hesitant at first, but agreed to let me in which was nice of her.
Beats the AF lounge, thats for sure - however, they both beat waiting in the terminal!