Boscos Restaurant & Brewing Co. is down to one location in Midtown Memphis' Overton Square after closing its locations in Little Rock, Arkansas, and Nashville this month. The Memphis-based restaurant chain on Monday closed its location in the River Market District in Little Rock, where it had operated since 2003, Boscos founder and president Jerry Feinstone confirmed today. Boscos also recently shuttered its location in Nashville's Hillsboro Village after 19 years, as we reported recently. That…