Green Park Resort is a nice hotel as it was member of Sunhine Hotel in Pattaya city. Pattaya Beach is unlike Phuket and Bali, But Entertainment I could say is much more exciting. Many Nice Restaurants International and lot of Shopping Malls to make shopping.
I'm not sure if Gree Park allow to do drinking around Pool, but why not if you stay at their accommodation.

Anyway as I say don't expecting to see clen beach at Pattaya But if you go to the near island like Koh Lan, you could see very clean beach and many water activities, such as Para Sail, Water Ski, Snorkeing, Submarine or Sea Walk(Never Try Before).

Any inquiry information you need to know I would be appreciate to help.