Francisco Villa, a line cook at the Hotel Indigo, stacked plates in the downtown hotel's Phi Bar and Bistro kitchen. When the 210-room Hotel Indigo opens its doors Monday, its corporate owners are hoping guests will be wowed by the ballpark and bay views, hip decor, colorful murals and energy-efficient design. It's even dog-friendly, with plans to begin hosting a “Canine Cocktails” happy hour come September. But all that cutting-edge design and an assortment of intriguing gimmicks may not be enough to overcome an ailing economy that has hit high-end hotels especially hard. San Diego's downtown luxury hotels have acknowledged becoming more aggressive in looking for ways to boost business in the face of declining revenues.