Aug 25, 2013 06:13 PM|davidfowl|LINK
So you're looking for a way to send messages from working roles but have them not subscribe to any topics? Why not just hack the service bus message bus to do what you want and use that on the worker roles (https://github.com/SignalR/SignalR/blob/master/src/Microsoft.AspNet.SignalR.ServiceBus/ServiceBusMessageBus.cs).
There's no built in way to do what you want. That would validate if doing the feature solves your problem. If it doesn't we can look at alternatives.