NE London Bike Polo: Wednesdays: Mitchison Road N1 / Weekends:Hackney Downs E5

Downs is not slippy in the wet! I have played there for about two hours in rain and it retained almost all its grip.

That is just one reason that it is the best court in Europe*.

*that I've played on.

More reasons. Reasons it's not the best court in Europe (that I've played on):

Surface is a bit lame in the wet (In my experience).
Ball can escape from the goals.
A bit small.
Posts make balls go in stupid directions.
Posts make riding quickly next to the fence sketchy.

Reasons its good:

Awesome grip in the dry.

I'll play anywhere.