The phrase "select nights" means specific or chosen evenings. It is often used to refer to a limited time period, where something special or exclusive is offered on certain days or nights, but not every day or night.
Sentences with «select nights»
On select nights, there is even live music performed in the hotel's lounge. (vacationidea.com)
The live reading will feature a mix of local talent filling the roles as well as audience members selected that night! (coolidge.org)
You are essentially booking a combination of cash for selected nights and points for the remaining nights. (takeoffwithmiles.com)