I'm hearing the live track rather than the album track which I'd prefer - but this is still good! This and Steppenwolf's [track artist=steppenwolf]born to be wild[/track] were absolute floor fillers at late 60s/early 70s discos!
I'm listening to the 1969 CTA studio version and the Terry Kath guitar is just awesome! This was the heaviest song of that era. Kath gets on the wa wa and really gets that natural high going for me. Love it!