From TVLand:
Uptight Mr. Roper (Norman Fell) and his nosey wife Helen (Audra Lindley) may not take to the idea of the trio living together in the Santa Monica apartment, so they convince Jack to pretend he’s gay, which would be easy enough if he wasn’t an avid skirt chaser and didn’t enjoy hanging out at local hot spot The Regal Beagle with his best buddy Larry Dallas (Richard Kline).
[tvland.com/shows/threescompany/]

From The Museum of Broadcast Communication:
Set in Santa Monica, California, the series chronicled the innuendo-laden, slapstick-prone misadventures of the affably klutzy bachelor Jack Tripper (played by John Ritter) and the two single, attractive women–one a cute, down-to-earth brunette named Janet Wood (Joyce DeWitt), the other a sexy, dimwitted blonde named Christmas “Chrissy” Snow (Suzanne Somers).
[museum.tv/archives/etv/T/htmlT/threescompa/threescompa.htm]

From Wikipedia:
The show was set minutes from the beach in Santa Monica, California, and mostly focused on three sets until the later seasons: the trio’s apartment, their landlord’s apartment and the neighborhood pub, The Regal Beagle. In later seasons more sets were used, frequently depicting Larry’s apartment, Angelino’s restaurant, Jack’s Bistro, and the hospital where Terri worked.
(en.wikipedia.org/wiki/Three%27s_Company)

From SitcomsOnline:
In this comedy, two contemporary young single girls found themselves in need of a roommate for their Santa Monica apartment so they decided to settle for the man they found sleeping in their bathtub–after a going-away party for their last roommate. Jack was harmless enough, but the problem was in convincing everyone else of that.
[sitcomsonline.com/threescompany.html]

I’ve never seen Freaks And Geeks, nor Sports Night.

I’d originally put Milwaukee, but that city came up again in two other questions. I figured I had to expand into other parts of the Badger State.