Wine! Drinking it mainly, but I have been involved with running tastings, marketing wineries and also selling it to restaurants. I've done some of the required courses, but I find education kills the enthusiasm - particularly if you want to write about it for consumers.
I also speak a few languages, having lived around the world, so English, Spanish, French, Italian and a smattering of German and also of Bulgarian (I lived there for a year in the 90s).
Event organising - I ran an annual conference for 300 people in different countries, so as well as building the community around the conference, we actually had to run the event too, and we got pretty good feedback for our events.
On a more personal note, I've recently started getting into gardening and the construction skills it requires (with some basic woodwork, plumbing of guttering and a first dabble with soldering. I've spent so many years doing this on computers and on the phone that I just HAD to start making some REAL things for a change