So, there was a day when I went to lunch with a colleague or two. Upon arriving there I see two other colleagues, on a much higher level than me, older as well, and we normally do not socialise outside work, are also there. I went and sat down, enjoyed their company and then left. So I never spoke abt 'hanging with them' or anything as I do not want gossip. 
Now today one of them comes in the office I share with the rest of admin and asks: 'when are we eating again?'
And I immediately think I should stop him in his tracks before he says I was with them at lunch, another 'gossip story', so I say, before he can elaborate: 'oh I dunno, when there's another occasion'
then he says: 'No I mean lunch from the company u order from'
Embarrasing...