noun
night pool; pool open at night
Refers to a swimming pool that operates at night, often with lighting, music, and a party atmosphere. A wasei-eigo term; not a direct borrowing from English.
wasei-eigo (Japanese-coined English), from night pool
夏になると、都内のホテルでナイトプールが人気です。
In summer, night pools at hotels in Tokyo are popular.
友達とナイトプールに行って、音楽を聴きながら泳いだ。
I went to a night pool with friends and swam while listening to music.