I just don't know if you can plant enough bromeliads to consistently attract them.
Bromeliads in my mind don't bloom often enough to be a reliable source of nectar. But it might be worth a shot. It's life cycle is to bloom and die. The new pups take time to mature and bloom.
But if you look at other plants or shrubs that bloom far more often like lantana, would that be better? Maybe tropical Hibiscus might be a better choice? Interesting idea though.