to warm up, to get warm, to warm up to (someone)
Toma un poco de tiempo calentarse con ella.
It takes a little while to warm up to her.
— Locamente millonarios (2018)
Entonces vienen a calentarse a mi casa.
So they come to my house to warm up.
— Les invasions barbares (2003)
La habitación está empezando a calentarse ahora.
The room is starting to get warm now.