Questions & Answers about De noche, me gusta leer en mi cuarto.
Because the thing being liked here is the infinitive leer, and an infinitive counts as a singular idea in Spanish.
So:
- Me gusta leer = I like reading
- Me gusta nadar = I like swimming
- Me gusta cocinar = I like cooking
But if you like plural nouns, then you use gustan:
- Me gustan los libros = I like books
So in me gusta leer, the verb is singular because leer is treated as one activity.