AFAIK, devices need to have browsers in order for them to be able to sign in to the public hotspots with the needed creds.
Should work like this:
Nice find Paraniod ! Thanks for sharing !!
:I did search around a bit, provided the Roku tv has that dorm/hotel feature and the hotspot is in range, it should work.
Maybe it's out of range for you, unless you have your own hotspot from a Comcast gateway then?