The school board in any urban district at its discretion, and the school board of any other seven-director district or of any metropolitan district, upon the receipt of a petition signed by fifty or more registered voters of the school district requesting the action, may establish and maintain night schools, make all necessary rules and regulations therefor, fix the rates for tuition of pupils above the age of twenty years and of others who are not entitled to receive free public school privileges in the district, and have general charge and control over the school. The school board may grant the use of, or lease, any of the public school buildings in the district to any responsible party for the purpose of conducting a night school therein. If the use of a school building is granted or leased for such purpose, the party using it shall keep it clean and in good repair and leave it in as good condition as it was when he took charge of it. If the party using the school building fails to comply with this section, the school board shall refuse him further use of it until he complies with this section.