Everyone gets into lines here. If a line forms, locals just join it, not knowing what the line is for, because it might be something worthwhile and the supply is finite.
My friends and I stopped in the street and clustered together, examining our “finds” at the local shops in Moscow. Someone interrupted us to ask what the line was for. We looked around and discovered that a line of people had formed behind us, waiting to see what was available. This was in 1990. Hopefully, supplies of anything are more available now, and lines don’t automatically form when a group stops to look at something.
Also, try tarhun (a green soda pop made from herbs, mostly tarragon that tastes sort of like root beer or birch beer) if you’re ever in Georgia or near the Black Sea. Yum!