Why hotel Wi-Fi defeats a streaming device
A hotel network almost always uses a captive portal: you connect, and every request is intercepted until you accept the terms or enter a room number in a browser. Phones and laptops handle this because they have browsers. A Roku does not, so it connects successfully and then finds every request redirected to a page it cannot render.
Roku's Hotel and Dorm Connect solves this by moving the browser step onto a device that has one. You start the process on the television, and finish authenticating from your phone, after which the Roku is genuinely on the network. It is a sensible design, and when it is available it works well.