Complex sentence: Venues for EDM in Las Vegas include many dance clubs, and open-air swimming pools like Encore Beach Club and Rehab at the Hard Rock Hotel, where up to thousands of people enjoy music at a single pool party.
Split into simpler sentences: Venues for EDM in Las Vegas include many dance clubs, and open-air swimming pools. At pools like Encore Beach Club and Rehab at the Hard Rock Hotel, up to thousands of people enjoy music at a single pool party.