I did a project where we used ClojureScript both on the server and the client. The server ran on Node.js and so most libraries could be used on both the server and client. We used reagent to render our app which made it possible to use reacts render DOM to string functionality.

Essentially the app was developed as an isometric app, and we had some additional stuff in the server part of the application.

While running ClojureScript serverside might not be everyone's cup of tea, it worked well for us.