During research for my overalls blog (woman rating 3) I found this interesting 1983 episode s6e15 about a class trip to Wales. Many boys in pajamas.
Next to the regular bedroom in the main entry there are also dorms.
At least 6 white metal bunk beds in at least 2 similar looking rooms for the boys and girls.
Previously rated 3, now 6-7 for this dorm scenes. Also other interesting scenes of kids in sports wear (white shorts) and speedos in earlier episodes.