Many, many times. I will always remember Brixton Ace in the 80's, it was hot as hell and they were at their peak but then they could produce 'Blindness' decades later and still sound absolutely on the button.
You go back further than me!
I did see them at what was the Ace but much more recently once it had become the Electric. I remember that one not for being hot but for being loud, really loud, even by their standards.
I saw them last at Wakefield three from the end.