We never had to do any of this back in AOCS. Maybe this is one of the "traditions" carried over from OCS when the two merged years ago. I have to admit, I don't see the training value in paying the officer and enlisted staff tabs at parties. In fact, I find it particularly reprehensible that any OCS officer would accept. I never allowed any of my troops to pay for my drinks, or even a fast food lunch. It just isn't done. Rather, it is the other way around. Even in the airline business the Captain pays for the beers. Not withstanding my aversion to having the junior or trainee pick up a social tab, you will see many more instances of forced economic participation in the fleet. Get used to it. I have dropped many hundreds of dollars at dinners, parties, and other events for Korean Naval Officers, an Australian Submarine, Yeoman Warders in the Tower of London, the CVW, hosting USMC and AF junior officers during a EUCOM exercise in Germany, and various other overseas admins, parties for sister squadrons, etc. Your duties and obligations are many. Call it tradition, diplomacy, courtesy, respect, fellowship, or whatever. It may be costly.