I'll toss in my 2 centavos from a year plus Applebee's experience both on the floor and behind the bar:
Firstly, their food sucks. Microwaved, pre-cooked & slapped on the grill under a crusted, black skillet, fried in something that could, to the untrained eye, be called "cooking oil", etc. That said, the one I worked at in El Centro, CA actually had some of their eggs in a row when it came to beer. The manager was decently knowledgeable about beer and it's foibles, and the selection was always a bit on the "exotic" side (i.e. IIPA's, lambics, English stouts, etc). Hell, the guy even recommended pairings to some of his more loyal customer base!
The sad part is, he was wrong 50% of the time. From what I remember, Applebee's has a set rule to clean the beer lines every month, which was certainly not followed sometimes since it's a fairly damn complex operation running 12 taps (at least this is the managers' excuse). Orders often came back incorrect or sour, broken glass in the glass chiller was a common issue, and he tried much too hard to be the "educator" about all things beer. I recall him telling me one night, just prior to closing up, that he thought frosted glasses made beer taste better since he thought warm beer tasted "putrid", and he preached this idea to the customers. Straight from the dishwasher into the glass chiller. Frozen ice inside the mug? All the better! Kegs kept at about 36F? You betcha. It's a wonder the lines didn't freeze up during the winter.
Wish I knew then what I knew now, because the place eventually got nailed by the county health inspector and guess what they found?
Yup. Dirty beer lines.
Moral: educate when you can, but don't try to appear pushy or arrogant about it. Bartenders & bar managers deal with a load more crap from belligerent drunkards than any sane person should, and they often survive off of tips (which are split at Applebee's, by the way). If you see something wrong, bring it up to the bartenders' or managers' attention.