Revealing mistake: As with many shows, the outside doesn't even come close to matching the inside layout.
Continuity mistake: In every episode that shows the upstairs of the Bunker household, Gloria's bedroom is across from Archie and Edith's bedroom. The exception is the fire that occurred in the Bunker's bathroom, in this episode, the bathroom is across from Archie and Edith's bedroom. All the shows after this episode, the bedroom is now across from Archie and Edith's bedroom again.
Answer: Yes, Gloria and Michael have friends, but when they got married they decided it was best to live *rent free* with Edith and Archie, while Mike was going to college. Living with friends rent free, for quite a few years, is not an easy thing no matter how close the friends are with them. Since the Stivics needed their money to pay for the tuition and its other costs, their living arrangement made it all easier to deal with. Hence the Archie and Mike scenarios.
Super Grover ★