I haven't been to C-U in a long time, but I'm pretty sure that Illini Inn shares the building at 4th and Daniel (

) with Bonnie Jean's pizza (it's above the Illini Inn where Willie's was).
thats the one! still have my mug club card somewhere, unfortunately its still under a wrong name, got it when i was 17.....i was at ole U of I from 90-94...and willie's wasnt there for a bit, but they started again i think when i was a junior late night slices, from upstairs. people would wait to go up the stairs to the pizzaria and get their slices when the bar closed....it was very cheesy, very thick but fabulous. especially after 10 mugs of michelob, a buck's worth of pretzel rods. some trivial pursuit at the bar, darts, or maybe some pinball, all in one of the tiniest but best crowd bar on campus. great jukebox too, not a lot of frat guys...sorry but thats what i remember, that was the inn.