Good morning,
I am currently working in a small industrial estate and quite like the idea that someone would come on Friday and clean commute bikes, there may even be enough customers for this is to be worth the person's time.
Coming to the house though would be too much hassle for me, I would rather do it that wait around for some to turn up.
Both going to a centre or having a work's visit where the person works unattended would worry me
as I have Di2 on my commute bike. I would be concerned that the person providing the service may not recognise it and a do something dumb with a pressure washer. It has the the older under the downtube battery mount and this can collect water, or I tried to push the rear mech is so that I could clean the sprocket.
Bye
Ian