Charity Coffee Time

Once a week I do some work for an office that is mainly doing charity stuff;
I started to do that couple of years ago..
And there is this guy in one of the rooms of the office who always puts some chocolate or drinks or sweets on the table with a little note.
The thing is that we have never met cause he is only working on Mondays and Tuesdays, me on Fridays or Saturdays..
We started to write each other some nice notes or sometimes we only put a cheesy smily on a post it..
We became some kind of never-met-before friends;
next Monday we will meet up for the first time and have a cup of tea or coffee together, I have no idea what the guy looks like, I dont know if he is old or young..but I guess it will be nice to meet up eventually!