OK - this one isn't going to be to everyone's taste, but here goes.
Eagles of Death Metal.
Silly name? Yup. Sunglasses on stage? (yup, a bit daft). But that's the most sweaty, enjoyable couple of hours I've spent in a long time.
Also, first club gig I've ever been to which managed to deal with no air con, mosh pit, crowd surfing, and 8 year old kids up at the front.
(And I've finally figured out that when I grow up, I want to be Joey Castillo, but with less ink
)