You must start with the other runners. In others, they are heats by pace group i.e. open. Fun Runs - This is perhaps the hardest one to decide. Just because you run hard does not make it a race. Some races are called races by the organizers but nobody runs them as races.
Some fun runs are very competitive races while some shorter secondary races are entirely fun runs.
They are specifically not timed or recorded and their spirit is of being a warm-up. The vote was split evenly but most of the concern was for more legitimate fun runs to be viable. Many races do not print results at all but are obviously races. Calling out times is adequate as long as it is an official of the race. Timing yourself is not sufficient except in the case where the race is by place only.