There must have been one beforehand but I do recall going to see the 5th Dimension at the Royal Albert Hall. Got a signed programme somewhere to prove it. Went with my sister who was in a leg cast from ankle to upper thigh, and on crutches. We peg legged it up to our seat riiiiiight up in the gods to be met by an usher said no, you are downstairs and by some miracle we were seated in a box. Never found out how that worked but my poor sister had had a full workout before anything had started! Honestly, two squarer new age hippies you’d never hope to meet. Good concert though.