Well there's walking/rambling (I can give you more info on these if interested), perhaps take up a sport...
or, there's an adventure group called Spice that I'd thoroughly recommend. Has activities for all kinds of people with all kinds of interests.
Check out
www.spicebham.com for more info on the group more local to us.
If you joined, you wouldn't look back.
Alternatively, I can get you this months brochure with the next few months actitivities in it if you're interested.
Let me know if can be of any more help.
BC