 When Yale is listed as the regular season winner, what tournament venue is given?
CREATE TABLE table_30506 (
    "Conference" text,
    "Regular Season Winner" text,
    "Conference Player of the Year" text,
    "Conference Tournament" text,
    "Tournament Venue (City)" text,
    "Tournament Winner" text
)
SELECT "Tournament Venue (City)" FROM table_30506 WHERE "Regular Season Winner" = 'Yale'