And to just give another side of this ----
One day only a few months ago I was eating out at lunch and was in the area of my T's office with a friend to do some shopping before my session. I was walking out and went past the bar and the bartender is someone I knew and she waved at me. I smiled and waved back and then left. It was lunch, but not that busy.
Well a few hours later I saw my T for session and he said "I waved back to you but was eating lunch with a friend so that is why I didn't say anything."
WTF ???????
I was like "When was this?" He looked SHOCKED and said "A few hours ago. I was sitting at the bar and you walked by on the way out and waved to me."
uhhhhhh no T, I didn't even SEE you sitting there!!