Yeah I used to get into Pubs easy at 16 & 17. I looked older & was athletic so that helped & didn't look nervous.
Most of my mates were at least a year to 2 years older than me. I finished HSC at 17.
I often had someone elses Licence (who was 18), but rarely was asked for it & Often they couldn't get in. haha .. so I had to find a way to get it to them without being seen.