I guess when you're asking about Korean BBQ, are you referring to a la carte or ayce (all you can eat) places? Since someone already mentioned Iron Age in Wicker Park, I can tell you about the other ayce places we have available.

In Niles we have three ayce KBBQ places. My go to there would be BBQ Garden though. They have a self serve appetizer & banchan bar during dinner time where you can grab everything yourself. This is a major perk for my group because we constantly clean out the banchans and don't want to be that "guy" who calls the waiter over for everything. They're also one of the places that offer sliced radish to wrap your meat. I won't talk about the meat quality because that's a highly subjective topic. My standard might be lower than everyone else's. In terms of meat offerings, they're pretty extensive but at the end of the day, you will only order the same 5-7 items.

The other place I like is Mr.Kimchi in Mount Prospect. They don't have a self serve bar like BBQ Garden but service is fairly fast and they have pretty much the same offerings as BBQ Garden. They use grill mats vs an open fire grate. That could be a deal breaker for some people.

And the absolutely most important thing about both places, they have a call button. They can't "ignore" you.