By: Deborah Speer exit / in SIGN OF THE TIMES: The exterior of Nashville’s historic Exit/In as the building’s owner makes a deal to sell the famed “Rock Block” property to AJ Capital.Jimmy Buffett played the first gig here. Comedian Steve Martin was an early regular, before becoming famous. It has a cameo appearance in Robert Altman’s groundbreaking film “Nashville.” Now, Exit / In, the city’s storied club celebrating its 50th anniversary this year, may fall to the wrecking ball. The property on which the leased building stands is in the process of being sold to AJ Capital, a luxury hotel developer.