Very early 1980s was my first, two quarters, a chair, and Pac-Man waiting at the A&W in Lake Arrowhead, CA.
I still have my glass mug from that day.
1985 if you want to get into home gaming, one of the original 100k~ NES units to hit the LA Market when it was there and NYC (and it still works!) Though I did have experience a bit with my mom's best friends console they had from the mid/late 70s the Fairchild Channel F system. My mom had one too I learned and it was hooked into a TV for a bit too but that was after I found it much later in the garage.
By the way what's up with voting for the stuff over like 35 years? Were you like that one dork who used the university oscilloscope to play Space War and Pong before it was called that?