Key themes might include identity, societal issues, urban life, or maybe political aspects. Since it's rap music, it's likely addressing real-life problems. I should look into the use of English in Moroccan hip-hop. Is it mixing languages as a reflection of multilingualism? How does the use of English affect the audience? Also, the song's title and content might contrast between the party (hafla) and the harsh realities, which could be a central theme.