It won't help your chromecast, but the Roku streaming sticks work fine on Hotel wifi. You connect the roku to it, then connect your phone to the Roku's direct w

It won't help your chromecast, but the Roku streaming sticks work fine on Hotel wifi. You connect the roku to it, then connect your phone to the Roku's direct wifi and go through the portal on your phone. It's worked in every hotel I've been in perfectly.