When I plan map layouts, I do it for the purpose of the place first and foremost. While you don’t include details about what it is in your case, I’m assuming you want to have the map act as a social interaction area. So you want to set it up to draw people to specific locations and plan it around where you want people to naturally congregate. You mention an ice rink, which would act as a decent central point to a map such as that, possibly with a small plaza around? It depends a lot on what you want to do with it and only you know your own creative vision. Use some large parts, play around with different layouts, and see what fits your game, your style, and your player’s convenience!