Hotify allows your guests to decide which songs are played next.
You set up a computer running Spotify and everbody can vist a mobile website to suggest and vote for songs that should be played next.
The proxy server is requried for broadcasting message. It is a simple server using ruby
$ sudo apt-get install ruby-dev
$ sudo gem install em-websocket hallon
Download libspotify.so from https://developer.spotify.com/technologies/libspotify to proxy-server/lib
If you download libspotify.so to some arbitrary location let LD know about it!
$ export LD_LIBRARY_PATH=<directory of libspotify.so>
By default the proxy server will listen on port 8080 on all interfaces
$ cd proxy-server
$ ruby server.rb
Add hotify directory to spotify (directory above spotify-app) and search in spotify for spotify:app:hotify