A "guest friendly" hotel is a hotel which allows unregistered guests (commonly prostitutes) back to the room. This is a popular "feature" in party towns or in towns where foreigners come to "meet" locals.

Many hotels do not allow unregistered guests to spend the night -- even when accompanied by a registered guest. In some countries, hotels will charge a "joiner fee" for any unregistered guests.

"Guest friendly" hotels are also sometimes called "no joiner hotels".

Solarpunk is a movement focused on a positive, ecological vision for a future where technology is used for human-centric and ecocentric purposes. It is a literary, artistic and aesthetic sub-genre and is also closely tied to eco-political activism. Solarpunk narratives have a distinctly positive and utopian foundation in contrast to the often dystopian visions found within other "punk" science fiction genres.