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A good place to meet would be in mid November where one weekend every year they hold the Real Ale Wobble in Llanwrtyd Wells, Wales. It's a non-competitive 'race' in the welsh forests where every so often en route there's a pitstop with Real Ale in barrels to help you on your way! Usually about 300 mountain bikers turn up. Then in the evenings you sup beer to live music etc in this charming small town in the middle of bumblef*ck. It's about £20 to enter and you can camp in the playing fields. Here's a link: http://llanwrtyd-wells.powys.org.uk/event8thalewobble.htm or http://www.virtualbike.co.uk/displayarticle7.html . For that matter just type Real Ale Wobble into google or your search engine of choice. I've been going with my mates since 1997. It's great craic.