It's my understanding , inferred from photos and personal accounts, that the officer / NCO divide in the Luftstreitkraefte was not as strong as in the RFC. The Kasino (mess) was effectively a pilots' mess rather than an officers' mess. I believe that the German class distinctions would not be erased despite this so I'm sure they sat at table by rank and the officers would probably have reserved certain events exclusively for their own kind. Depending on the facilities, the NCO pilots would room with each other rather than with officers, although I suspect they could on occasion be under the same roof.
I believe Offizierstellvertretern were housed and messed like officers.
NCO pilot life in the German service wasn't like the RFC, where a sergeant pilot was strictly a member of the Warrant Officers' and Sergeants' Mess and billeted apart from the officers. Once he landed, his companions were nearly all technical NCOs and he would have been lucky to have another pilot to hoist a pint with. Must have been tough.
I stand to be corrected on any of this, so am interested in others' comments.