I used to all the time but now not always.

I was kind of turned off when I had booked some removalists and they were doing a really good job (but hey that is there job and what I am paying them for) but anyway I needed a coffee and maccas was a couple of doors down from my then unit so I asked if they wanted one (which they said yep, that would be great). I go buy coffees (and dont get me wrong I knew I would have to pay and wasnt wanting the money back or anything) but they seriously stopped working for a good 20minutes to have their coffee and chat and there I am paying by the hour on a Saturday. Also because of my friendliness, they kept stopping to chat to me (at one stage one of them was telling me about his mother who had passed away and then I felt like I had to listen) and all of this just took up more time so then by the end I was probably paying them an extra hour ($75 just to have a coffee and chat).

So I am not as friendly anymore to tradesmen. I will still offer a glass of water though.