There are several places dotted around the UK where you can try out your killer moves:
Xscape - the Dolomites of Milton Keynes. Head to the Sno Zone where a three hour boarding lesson will set you back £72, but you'll gain credibility on the real slopes when you get there. And perhaps not break a leg.
The Sandown Sports Club - Surrey's greatest artificial piste.
Bearsden - Boarding, Glasgow style.
The Ackers - Head to this well equipped center in Birmingham for a menagerie of outdoor activities. Snowboarding included.
Christchurch Ski Centre - The gentle folk of Dorset have no problems on the piste if they pay a visit to their local ski slope before hitting the white dust.
Rosendale Ski Centre - Lancashire lads and lasses get an upper hand with boarding lessons here.
John Nike Leisure Centre - Made famous by Ali G, this ski centre actually offers some fantastic lessons and can be found in the picturesque new town (?) of Bracknell.
Final words of advice? Take a couple of lessons before you try snowboarding. Even if you can ski and you think you could give Shaun White a run for his money. It will save you at least a day or so of utter slope shame. Here's one of America's top boarders in action: