[peteevans]

As a fellow programmer, I'd saying dancing is good physical without seeming like it, if you find the right place it can be really social and you mix with the non-nerds which is nice in breaking the geek-perspective (or back to reality). I've done ceroc/modern jive for years and found it to be friendlier than salsa (and with better music - not a salsa fan) and being a paired dance you mix with lots of people.

Otherwise bit of photography seems popular to combine some walky with your inner tech!