I've had a opportunity for a couple of dives in a pool, but the one time I did it outside a pool was in Vanuatu when I was on a school trip as a teenager.
My friend did it while on his OE, went diving all around UK and western Europe. Now he lives in SE Asia and has done a bunch of stuff there too. Loves it!
He has no kids, so can do that sort of thing. I haven't even left the country since my first kid was born!