In the UK version of the show, virtually none of the characters are likable, even the protagonists that you are supposed to be relating to or rooting for. And I know, that this is part of British humour that part of the point is just to make everyone feel awkward and uncomfortable, and kudos to Gervais for accomplishing that, but it's also at the same time a much less enjoyable experience for the audience. And while, yeah, you'll get some nervous and uncomfortable chuckles from the UK show it's not the full on belly laughs of the US one.
In response to requests based on that scene, Maid of the Mist stated that you can get married on their vessels, but not by the captain, since he or she is busy running the ship. It's strictly BYOM (Bring Your Own Minister).