CREATE TABLE table_203_872 (id DECIMAL, "year" DECIMAL, "location ( s ) " TEXT, "number of contestants" DECIMAL, "ladies winner" TEXT, "men's winner" TEXT)

who 's name was listed the most under male winner 's .
SELECT "men's winner" FROM table_203_872 GROUP BY "men's winner" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "men's winner" FROM "table_203_872" GROUP BY "men's winner" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1