If you're commuting between the Greater Danbury area and Grand Central today on Metro North trains, you won't be able to have alcohol on board.  The MTA Police Department will enforce a ban on alcoholic beverages through 5am on Saturday.  Any alcoholic beverages found by the MTA Police will be confiscated.  The ban is in place as some extra trains are added for the St. Patrick's Day parade and celebrations in New York City.