Sage Restaurant Group is a different breed of multiconcept operator. Its specialty is the creation of one-off restaurants that go into hotels operated by its parent company, Denver-based Sage Hospitality Group. You’d think SRG would play it safe and choose middle-of-the-road concepts that pose little risk. They don’t. Instead, SRG swings for the fences every time out, opting for high-energy restaurants that feature imaginative design, a vibrant bar scene and buzzworthy food.