We choose to use it for several reasons some of which are:
* The term seemed to growing in usage and how it was being used described a reasonable chunk of what we were trying to do. I dislike new terms for the sake of new terms, though I am not 100% sure that is the case here, and it would have been going against how the terminology seemed to be evolving.
* Workshop and similar words invoked images of a for profit business(Tx/Rx is a non-profit).
* Workshop correctly invoked thoughts of metal working, wood working, CNCs, but did not invoke thoughts of programming, soldering, circuit design, or a tight knit community. At least to the small number of people I asked when we were trying to decide what we would call ourselves.