50 years ago THE RAF Sgts' Mess was a collection of all Sgts' messes. All paid in to the GMF (General Messing Fund) and any could request a sub for a mess ball or some such. Thus big messes like Kinloss or St. Mawgan supported tiny little messes (like Strubby - 6 members) so that all SNCOs and W/Os enjoyed similar privileges. Therefore wherever an RAF SNCO or W/O went he was a full member of that Sgts' mess. As aircrew we were always dropping in to different stations, diverted for a coupla three nights or on detachment. I recall we had to pay a small mess bill when we left but it wasn't much.
The Army was very different, each regiment had its own Sgts' mess. We dropped in to a tank regiment Sgts' mess near Pembroke Dock and were asked to sign the visitors' book and wait. The RSM then welcomed us, led us to the bar and said to a pongo, "Sgt. Bloggs - these are YOUR guests." The poor booger had to pay for our drinks all night as we weren't allowed to. The bar stayed open so long as the RSM was present. It didn't open till he arrived and closed when he left.
Navy messes were more free and easy but we had to split up: Sgts to the POs mess, Flt.Sgts to the CPOs mess. Don't know where W/Os went. However at JASS, Londonderry (HMS Sea Eagle, a "land" ship) we insisted on our own "Aircrew Mess" cos POs' and CPOs' mess bars shut promptly at 10 or 10.30. In our own mess we could continue in the RAF Sgts'mess bar tradition of staying open till the last man fell down!
But p'raps its all changed........