Once as well for me. But I was so lucky. It was the 2011 iTunes festival. I won tickets from their Facebook. Also, I was studying abroad in London at the time so it was just fate that I was able to go.
Unfortunately I've never been able to see them live Nearly went to see them in Bristol a couple of years ago when they were doing their mini tour after Killer Sounds was released but uni work got in the way.
3- the first was in worthing, my hometown, a week after the release of once upon a time in the west in September '07- very special gig as they were my favourite band at the time (still are, among 2 others!) the second time was the big arena tour at the brighton centre for OUATITW in December '07 and was one of the best lighting shows i've ever seen. finally, in 2011 was the little show at Jam in Brighton, was great to see the boys on top form and belting out new numbers, hoping for something similar again some time this year!
Once - that was for the 2007 Glastonbury festival. I'd never really heard of them before then but I bought one of their albums in HMV after, Stars of CCTV I think, and became hooked on their music. I'm now officially a Hard-Fi addict