The ever-evolving Russian Benevolent Society at 14 Linden Street, Allston wants to become a 450-seat restaurant and lounge with live entertainment, as well as adding a patio that would accommodate 90 patrons. It started out as a private social club, but has gone from that to serving the public three days a week, and last year to a seven-day-a-week operation. Apparently there was a steam room in the building as of 2010, but no mention if this is still part of the operation. The hearing will be Tuesday, March 26 at 9:30AM before the Zoning Board of Appeal in City Hall.