A public hearing is being held in Ridgefield tonight about a land purchase.  The town is looking to buy 3 acres off Ridgebury Road.  The $250,000 proposal is to add the acreage next to the Ridgefield Golf Course clubhouse.  Officials say the land could be used for parking, a well and septic system, or a new clubhouse.  If a positive recommendation is made, a town meeting will be held about the sale.  Tonight's public hearing is at 7:30.