politicking by wining and dining
Refers to the practice of building political relationships and influence through social events, meals, and drinking parties rather than formal policy debate.
That politician is famous for politicking through wining and dining.
We should compete on policy, not rely on banquet politics.
政治 is the general term for politics, while 宴会政治 specifically refers to the informal, social aspect of political maneuvering through entertainment.
Compound of 宴会 (banquet) and 政治 (politics), literally 'banquet politics'.