First off, welcome to both of you to the board.
There is a ticket exchange board here. Click
this link to check it out.
For bar options, though the crowd may not be "older," you'll probably enjoy Sally's beer garden. Packed with people normally, and a generally good vibe.
Stub and Herb's also had a great beer garden for the opener, but I'm unsure if they still do this. Word on the street was that they got busted for serving underagers and shut it down for a while.
Campus Pizza provides some of the best eats on Washington Ave. and also has a beer garden that is pretty funny.
I also think U Liquor has a small beer garden in their parking lot.
If you want to venture into Dinkytown, Blarney or Library will be a good time.
Otherwise, you can venture into Northeast for what will likely be an older crowd. Nye's (though I doubt the live polka is bumping in the morning), Whitey's, Bulldog, Legends, etc. With these bars though, you may want to check their hours ahead of time. They're far enough off campus (about a mile away from stadium) to not necessarily cater to the demands of early drinking on gamedays.