Who sings regalame una noche?

Depending on which version Regalame Una Noche is sung by

Los Inquetos

Maelo Ruiz

Javier Solis

Arcangel & J. Alvarez

Luna Llena

and many others

Regalame una noche is flowery language for "Give me a night."

Give me the gift of one night.

Closest English idiom would be "Would you do me the pleasure of joining me tonight"

(Regalar = To give a gift)

(Regalame = Give me gift)