Don't fill up on lunch. Eat like a normal person but get some IC OGs - Panch, NoDo, Hamburg, etc.
Stuff yourself for dinner. Pizza at Sam's or Pag's - or even Airliner if that is nostalgic for you. Go down to The Vine and pig out on wings or a burger. If you're one of the weird people that likes BoJames or Short's burgers (more so their fries)...go for that. If you're feeling just a little fancy - get the burger at Pullman, the buffalo chicken burrito at St Burch, or the bolognaise at Basta. If you're feeling mega fancy go to The Webster and have overpriced mediocre food but great service. Do yourself a favor and walk down to Big Grove and get some beer and pretty much anything on their menu that sounds good to you. If you want to feel like a weird local, go to George's and get a burger. If you want to feel refined, go to Brix and get a plate of meat and cheese. If you want slightly upscale and probably not what you went for in college or off the beaten path, go to One Twenty Six, Baroncini's, or Black Angel. For games, Iowa City insanely does not have a great sports bar scene unless you want to go to B-dubs (puke). Just go into any bar you see with TVs and they'll probably change it for you if they have the channel.
Enjoy. I'll be out on the town for sure a few nights while you're here. But I don't meet weirdos from the internet. No offense. It's not just you. It's every HORTer except
@alaskanseminole. Sorry.