We play on a big paved area next to tennis courts. In certain weather and at certain times (fall) we end up playing on the tennis courts because of the lights. Our normal court doesn't have lights so early spring/late summer/fall games can often get dark pretty quick. Bad weather and winter we play in the basement of a local parking structure. Tennis courts tend to be the most used polo courts because most cities do have them and they are often a good size for polo with fences/nets around most of them.