So I had an interesting idea today (shower thoughts really) on this topic.
Last offseason that filing posted for a building being RPT, and it was an ok size. So what if instead of retro-fitting a building to be a members lounge, they built one new ground up? Yes I know that's an expense for the park but picture this:
A gate that looks like the entrance to a French Palace, where you show your membership to get it. A beautiful walkway that is grass and gardens back to the building. 3 story building+basement designed to look like a French chateau. 1st floor is a general lounge. Indoor seating, outdoor patio facing the train as it passes by. Nice chairs out there. Basically a welcoming relaxation area. Floor 2 is a members only sit down dining area with indoor/outdoor seating. Full service menu. 3rd floor is mostly open terrace, but it's a roof top bar that's 21+ only. Tall enough for night time fireworks viewing, a view into RPT for night time shows as well. I mentioned a basement, and that would be the wine cellar. Another 21+ only area that's strictly a wine bar. Put it down under the building so you really feel like you are in a chateau's cellar.
Entrance is at RPT's entrance, flip the concessions stand to the other side of the walkway, make it wider for the member lounge entrance exit.
Now you got a nice members only area/lounge, but it's out of the way, never in a threat to be taken over by something else, and you feel like you get your money's worth.