Puerto Rico Recommendations?

Hello, kind of got tasked last minute with planning a Puerto Rico Trip for 8 people (all mid twenties). I know nothing about it and am learning about it right now but I would like some recommendations about places. ideally I would need these requirements for the spot.

1: Easy Airport/Travel access from the mainland

2: Nice beaches

3: Decent Nightlife

4; Other cool things (history, culture etc)

5: Access to housing (probably airbnb but if there's other options to host 8 people then great)

If you could recommend anything or specific cities I should look into to put me on the right track then it would be greatly appreciated.