Los sábados por la noche, yo generalmente (1) [salir] con ellos a la discoteca. a veces, también nos juntamos (get together) en una casa: (2) [traer] algo para comer y (3) [ver] una película, o yo (4) [poner] música y bailamos. y tú, ¿qué (5) [hacer] con tus amigos?

Salgo is the conjugation of the irregular verb salir that matches the first person singular in the simple present tense. The simple present tense is used to talk about habitual actions or routines. So I go out with friends on Staurdays nigh. Finally we can write the first sentence as follows:

Los sábados por la noche, yo generalmente salgo con ellos a la discoteca.

Traemos is the conjugation of the irregular verb traer that matches the first person plural in the simple present tense. The simple present is also used to describe things that happen now or in the near future. Therefore, in this sentence we bring something to eat when we are together.

A veces, también nos juntamos en una casa: traemos algo para comer

Vemos is the conjugation of the irregular verb ver that matches the first person plural in the simple present. It's important to say here that you need to learn by heart conjugations for irregular verbs because there is no any rule that this type of verbs must follow. Finally:

...y vemos una película

Pongo is the conjugation of the verb poner that matches the first person singular in the simple present. So I put music and we dance. So música is a feminine singular noun that translates into music. On the other hand, bailamos is the conjugation of the verb bailar (to dance) that matches the first person plural in the simple present. Finally:

...o yo pongo música y bailamos

Haces is the conjugation of the irregular verb hacer that matches the second person singular in the simple present. So this is a question that means what do you do with friends? So the word amigos translates into friends. Finally, we can write this sentence as follows:

¿qué haces con tus amigos?