It's going to be a legend within a legend: The Sand Dollar Downtown will open later this year inside Plaza!   Rockin' for more than 40 years just west of The Strip, the Sand Dollar has been a favorite of those in the hospitality industry. Its intimate, old-school vibe is combined with an elevated but unpretentious bar program you don't usually find in live music venues.    The Sand Dollar Downtown (which JJ's already nicknamed "The Downtown Dollar") will resurrect the energy of rock's golden era, and provide a comfortable, modern experience. It will be just off the casino floor, and have its own entrance on Main St.    Joining Jonathan and Lisa are Sand Dollar co-owners Anthony Jamison and Nathan Grates, along with Plaza Food & Beverage Director Ryan Rowland.     Hosts: Jonathan Jossel, Lisa Melmed, Gary Vickery