if you like the beach. Many Thai go to the beach at this time and there is often a traffic jam resulting in difficulty getting a song tau back to boys town, sunnee or where ever. There are bars & decent - very good restaurants within walking distance.
When I'm there at that time I usually take that week's, or month's, Bf and a couple of his friends to a movie at Big C, dinner after the movie at a Thai restaurant, avoid the tourist (trap) "special" dinners; then a couple drinks and to the room for the real celebration. Dancing to my CD walkman, with speakers; what did you think?
Since you are arriving on the 30th you'd need to do a bar crawl & hope to connect with a 'keeper' that night or take your chances on the 31st, so best you get to the bar early, at opening time, before the good ones are all off, or have been offed three times, and don't procratinate. He who waits gets sloppy seconds. Or thirds.
If you don't stay at the beach you might try Monty's pool and avoid the rat race to & from (worse) Jomtien.