[stylin19a]

Pictures on the wall are of Marines. These all look like Marine 4-stars in this picture.
It might be that they are in Marine HQ’s in D.C. - 8th & I.
Those are not eagle,globe and anchor (hooked) on the cups.

I haven’t as yet tracked down the event and all the names.
I’m checking out all the Marine 4-star pictures in wiki. I can’t read the name tags in the picture.

Marine on the far right looks like John Allen.
3rd from right looks like John Paxton.
2nd Marine from right looks like Gen, Dunford.

a lot of different views of those generals doing this search.

https://duckduckgo.com/?q=marine+4+star+generals+in+picture&t=opera&iar=images&iax=images&ia=images&iai=https%3A%2F%2Fsofrep.com%2Fwp-content%2Fuploads%2F2016%2F12%2FMarine-Generals-905x603.png

[generally]

Still can’t shake the idea that there is a point to the coffee cups. Something’s up, IMO.

[xone]

These all look like Marine 4-stars in this picture.

If they are most are retired, Marines only get two active 4 stars. One of them is IDed as the new SouthCom CG, so he's a two. Think they are @ 8th and I drinking out of the Commandant's cups.