Wanted to have some minimal control via Openhab without reverting to Spotify client, so created a custom Spotify Widget from which you can play your playlists on selected player (also supports simple spotify search).
This is client-side only widget (habpanel only). Minimal testing done on modern Chrome.
You must have Spotify Binding configured as described here:
Code and instructions: https://github.com/gytisgreitai/habpanel-spotify-playlister