Palm Springs Sunday brunch for 15
With a smaller group, we'd go and wait at Cheeky's, which is our (everybody's ?) favorite place for breakfast. In this case, we need a good place for 15.
Preferably outdoors. But the most important things are good food, good drinks, and a comfortable atmosphere.
Normas is too expensive for the group, or it would be a no-brainer.
Conceivable that Escena (restaurant at the golf course development) would be right for you. Not saying that it is "chowhound" food necessarily, but I had a perfectly good dinner there once, sitting outside and watching the sky. You should be able to get a good sense of it on the website, http://www.escena.com/dine/