As some of you will know, I lived in BA from 1974-76 when my dad was the British Naval Attaché and now that I'm putting together a family timeline, I've found plenty of photos from that era.
Here's one from 1975 at the US embassy in BA, being greeted by the US Naval Attaché and his wife. You can just see my sister and brother following my father down the line. They were very formal occasions, as you can imagine, so it wasn't a good idea to spill your drink.