I've had another look through the Design and Access Statement just to scope out the hospitality proposed. It talks about it being similar to Joe's bar - which from a youtube stalk as I've not done it, offers a free drink and then is pay as you go. Pretty informal, nothing special but then a padded seat in the 2nd tier. Not sure on the cost of it for a game/season.
The difference here, and what might make you slightly happier
@jrb (only slightly mind) is that the floorplans for the NS expansion show a similarly informal area which doesn't offer much more than a beer and burger/pie experience but it's accessed via the main concourse with the regular fans and shares the toilet facilities as well. The seats aren't a segregated 5 rows which provide any reason/justification for paying extra for and you'd imagine that as a result the club will charge a small additional fee simply for access to a "private" bar and seats in a good location in the stand. People might pay a hundred quid or so more for that privilege so I really don't think you'll see such a difference in demographic that you'll have people unwilling to stand and sing.
If you want hospitality, surely you want separate toilets and a little bit more than this looks to offer on the face of it?!