Here in Norwich, we have 4 Parkruns around the outskirts of the town centre with this one being my closest.
It is a very basic parkrun because it is relatively flat and mostly concrete it attracts the more competitive type of runners due to it being flat etc and there are no dogs allowed on this parkrun. It also attracts many casual runners it was the place of my parkrun debut. busy? yes, this parkrun can get very busy with a total of 498 runners and 28 volunteers today but one of the volunteers did say in January numbers exceeded 600. I think with another parkrun being based 15 minute walk from this one helps keep the numbers from getting too high