This gate agent sounds like she has it down.

I unfortunately had the agent who got it about half right.

Last week boarding JFK - LAX, the gate agent announces all Premium/Business, Sky and Zone 1 to line up to the right of the boarding zone. Everyone together.

Everyone obeys figuring she will sort it out once she has us all on the one side of the boarding area.

She tells Zone 2 and Zone 3 to line up to the left. They all follow suit on their side.

So there we all are, Premium/Business, Sky, Zone 1 lined up pretty much single file down the hall way in front of the restaurants, etc.

Then she disappears, the line does start to board/move forward, then stops. THere are about 6 people ahead of me. No one could hear any announcements being made so the single file line starts to curve into the front and slowly becomes wider and wider.

I asked the people in front of me why they stopped, after asking up to the 4th person ahead, I was told they were told to wait as they were only boarding Premium/Business, they were all Zone 1.

So we went around the people in line - we were Premium, worked our way through the now huddled masses who were just looking to get ahead and hear what was going on.

If they are going to line people up, that is fine - but do as the gate agent in the OP did, line up the zones seperately, check the boarding passes. Having 3 different zones in one line was a cluster for everyone involved.