i was in a hotel in capetown powered by alwayson the speed and reliability was worse than powertel!!!
you will also find that for "1000" users/devices and the hotel space - they will have multiple AP's per floor so in say an 8 floor hotel just at 2 per floor is 16 base stations for a single hotel - now multiply that to the CBD
not saying its impossible, but the technical restrictions and AP limitations probably make it financially prohibitive to do, even on a pay for access model.
its a catch 22 really - it would really benefit all, but the costs that a provider would have to sell access at would make it too expensive for many people in zim in particular or they would never recoup there investment in any normal lifespan of the equipment itself