Lockers are a great idea, although no padlock is safe with some people.
I think health and safety would have a field day with dogs padlocked in permanent enclosures. The fire risk in these building is high and anything that is locked creates problems in a swift exit should an evacuation be needed.
We absolutely need more room around the benches, again if the need arose imagine trying to evacuate the bench areas at Melb Royal with the Public all over the place and the cramped in benches.