PHILADELPHIA -- This may be the last free Thanksgiving dinner for the Boy Scouts of Philadelphia. Citing a local 1982 "fair practices" law, the city solicitor has given the Scouts until Dec. 3 to renounce its policy of excluding homosexuals or forfeit the grand, Beaux-Arts building it has rented from the city for $1 a year since 1928. "While we respect the right of the Boy Scouts to prohibit participation in its activities by homosexuals," the solicitor, Romulo Diaz, said last week in an interview, "we will not subsidize that discrimination by passing on the costs to the people of...