I don't want beginners on the outside lane of Ronda if they don't yet know how to navigate. They can dance on the inside. Any beginner that will hold up the traffic has no business being in the outermost lane. Isn't that the codiga too.
This is one of the strange things in tango - there are both versions:
1) Beginners should be in the outer lane. The rational is that navigation is easiest there (there is nobody on the right, the lanes are the longest), and even the most basic vocabulary of tango (walk+ stop) will allow them to progress forward and avoid bumping into the couple in front of them.
2)Beginners should be in the middle. The rational is that if you don't move no navigation is necessary, and doing a sort of slow-dance with some stationary tango vocabulary (giros, ganchos?) mixed in will give them a bit of tango experience without getting in the way of other people.
I personally don't like 2 - i think it is adapted ballroom etiquette where sometimes stationary and progressive dances are danced at the same time (foxtrot+swing). I think we are doing beginners a disservice when we teach them tango as a stationary dance, and it leads to these intermediate dancers who dance tango not as a progressive dance, but as short stationary sequences connected by running to the next empty spot on the dancefloor, wherever it might be.
In reality i think depends on the culture of the ronda at a place - there are a lot of places where the outer 2 lanes are complete chaos, and as a beginning leader it is not possible to deal with people zig-zagging, running into my back, trying to push me out of "my" lane into the chairs. The space in the middle is a island of peace there, and most vocabulary is taught as stationary in classes anyway. In other places there is no quiet middle, and it is if anything the messiest place of the ronda - the innermost lanes almost touching, people trying to do too big stationary elements in too small a space with people moving around them in all directions....
In my experience beginners in the middle happens most often on comparatively empty, big dancefloors -there "advanced" dancers often claim the right the shuffle along the edge of the dancefloor and do tiny vocabulary. Beginners on the edge happens most often on smaller, more crowded dancefloors - either there is no quiet middle, or if there is, "advanced" will claim the right to do elaborate big stationary vocabulary there.