所 means place or spot, and I see it a lot in combination with other kanji to indicate a certain location.
台所 だいどころ kitchen
事務所 じむしょ office
住所 じゅうしょ address
個所 かしょ passage; place; point; part
場所 ばしょ 1: place; location; spot; position; 2: room; space;
洗面所 せんめんじょ washroom; bathroom
市役所 しやくしょ municipal office; council; city hall