Active Holidays

With work seeming to get in the way of my sport so much, I'm trying to find some holiday destinations that will let me do some structured training - ideally with some like-minded individuals who could spur me on to greater things. 

I don't just want a hotel with a spa and gym; and I don't want somewhere that focusses on watersports, as swimming is not my thing at all.

Does anyone have any suggestions for venues?

Regards,

Peter