I avoid Casey's on midget nights, but go for the great happy hour. By great happy hour, I mean cheap beer at a dark smoky bar. As an added bonus, the bartender lets you know when happy hour is about to end, so you can get one last beer in at the cheap price.
The first 5 times I went here, they were playing Family Guy on all their TVs. This is a dedicated bar.
If you're in the mood for a microbrew or import, Casey's also has a surprisingly large selection of drafts. For the thrifty conscious, you can often find an unadvertised special by looking at the hand-printed signs below the taps for the beers that they're cycling out soon. Last time I was there, they had a $3 Great Lakes draft.
Overall, go for the specials, but don't expect high-class here.