Me too. 50 years ago roughly now (not sure of the exact day, but it was early 1975) I first used Unix (v5) in the Computer Research Facility (CRF) at the University of Toronto's Dynamic Graphics Project (DGP), which shared the PDP-11/45. DGP got the machine from 5PM to 8AM and the whole weekend. I spent countless nights in the lab.
Thanks to DGP head Ron Baecker for seeing something in me.