Rule reminder
To make suggestions use: 'Potremmo + infinitive' (We could...), 'Perché non potresti...?' (Why couldn't you...?), 'Potreste provare...' (You could try...). Also: 'Andremmo al cinema?' sounds like a suggestion. Potremmo is the most common way to suggest something as a group.
… (noi/potere) andare al cinema stasera. (We could go to the cinema this evening.)