From the architects of the Paris Hotel & Casino in Las Vegas comes Barona Valley Ranch, in the Barona Indian Reservation in northeastern San Diego County. The 364-room resort, which opens this month, plans to raise the bar when it comes to gaming in California, with a luxurious, new casino as its centerpiece. For groups, the 20,000-square-foot Founders Hall is available for functions, as well as three ballrooms in the brand-new Golf Event Center overlooking the golf course.