Mens Room Etiquite.

Well the only exception for not using urinals next to each other is at a concert. In this case, the same order applies but all urinals must be used. In between sets, everyone goes to the bathroom and there is often a line. This calls for more extreme measures.
There also can be an exception made when there are dividers between the urinals. The same order is used but all urinals can be occupied in this case.