Atmosphere = enjoying myself. It'll be shoulder to shoulder, knee to knee next week, but I'm not gonna exactly be enjoying that... especially if still extremely hot and humid (night will help). The numbers of PSU supporters is always over counted by the media but almost as annoying will the casual 'event' fans (who really don't support either, even if they put on the lone Pitt cap in their closet, likely to be the Dinocat variety ... or more likely a Steelers shirt, hopefully Conner at least).
They'll sit like lumps, no cheering, eating up a storm and spewing waste ... Clogging the restrooms, slowing entry and concession lines, griping over the price of a box of nachos, grumbling that Pitt is 'allowed' to play in the "Steelers stadium", getting up and slogging past me in the middle of plays ... mocking us mildly (vs the louder PSU fan mocking) if we go down early ...
Before the game they'll be driving about aimlessly, confused in the North Shore expecting easy cheap parking like they got in 2001 (their most recent Pitt game, which they went to because of the new stadium, unless they went to this game two years ago). Lost after the game, wandering in the cross walks "now where is Blue 5 lot again?", trying to cross 3 lanes or making illegal u turns etc., clogging traffic worse.
Bah, I know the program wants and needs more regular fans like that for more profit, but you can have that kind of "atmosphere".