Final answer:
Renaldo and his friends are likely listening to Electronic Dance Music (EDM) at the dance club, characterized by its mix of pop elements with percussion and driving beats.
Step-by-step explanation:
When Renaldo and his friends hear the DJ mixing pop songs with elements of percussion and driving beats, they are most likely listening to Electronic Dance Music (EDM). This genre is known for its rhythmic dance beats and is often played in dance clubs. While rock music could involve a CD or mp3 being played on a portable electronic device connected to speakers on a lightweight table, the specific description of music with driving beats and a mix of pop typically aligns with EDM's characteristics.