Try the Quad (or Quint) Cities if you want a dynamic with more than two cities. Three on the Illinois side, one (or two) on the Iowa side.

(It started as a “tri cities” so the bump to five isn’t the first it’s seen)

Bonus points: an OK native pizza style if you like tavern-ish pizza varieties.

Related to TFA, a “judgmental map” of Omaha and Council Bluffs:

https://i.pinimg.com/736x/0a/db/ea/0adbea3bcdffbcb4ccfe6ec10...

Warning that these are usually offensive, or at least have the potential to offend (but often super helpful when visiting a new city…)

Council Bluffs just gets a blanket “meth and casinos” label.