If you have two hours to kill and feel like wasting it on hanging around for a plate of breakfast food to show up at your table, then Denny's in Champaign is the place for you.
If you fear or dislike attention, you will be very comfortable at this place. The host will not make eye contact with you and will pretend not to hear you when you speak. The servers tend to leave you for long stretches of time, so that could feel non-threatening to people who prefer to be unnoticed.
Most people are likely to be extremely annoyed by the glacial place of the service that yields lukewarm or cold plates of food that may have been good had you got it when it was fresh. And to have it served to you by people who clearly view you as an intrusion on their day is probably not most people's cup of tea either.