The Ottawa Senators stuck their arena out in a residential area and that worked wonders for them, so I'll do the same. But on a more serious note if I were to design the perfect arena neighbourhood I would place it downtown or somewhere equally easily accessible via public transit. I would have some pay parking nearby for those who choose to drive and I'd keep the price relatively low so it's not too outrageous. As for amenities I think a healthy balance of leisure and entertainment is best. Depending on the climate maybe an outdoor rink nearby, or if not a second community rink accessible to the public before games. For the adults I'd include a casino and a variety of bars ranging from casual sports bar to fine dining restaurant for those with a bit more cash to burn. For the kids an arcade sounds like a wicked idea. I'm not sure what happened to arcades but let's assume they are still a solid business idea for this purpose. Lastly I think a nice green space just past all these amenities would be a terrific addition for those none game days. Just a place for the city folk to gather and hang out, maybe host the odd event.