International Electrotechnical Commission conference attendees are sitting at the next couple of tables at Restaurant Archangelskoe "Ресторан Архангельское".
I believe I have identified Louis Costrell in the image. He sits facing us middle distance in center of frame, leaning over bottles. He was part of the US delegation to IEC, and was founder of TC45.
Here is <a href="http://www.flickr.com/photos/tigerzombie/6951230175/in/photostream/">outside the restaurant</a>.
Photo by my grandfather David C. Cook. Scanned from an unlabeled Kodachrome slide, date stamped October 1969 and numbered W4 28. In an unlabeled slide cartridge.