Simple categories matching onetime:

• benefit,
• event,
• activity,
• project,
• payment,
• job,
• item,

Members with property onetime:

• wedding,
• theft,
• night,
• natural_disaster,
• fire,
• performance,
• election,
• birth,
• summer-camp_program,
• meeting,
• examination,
• campaign,
• ergonomic_equipment,
• ribbon_cutting,
• trade_show,
• reserve,
• war,
• marriage,
• tax_refund,
• dedication,
• major_landslide,
• exhibition,
• reception,
• suit,
• olympics,
• corporate_retreat,
• strike,
• inheritance,
• death,
• transfer,
• celebration,
• press-release_creation,
• school,
• capital_campaign,
• collection,
• session_setup,
• convention,
• tool_allowance,
• key_exchange,
• public_performance,