Does anyone know of a 4* or 5* hotel in Bangkok (Sukhumvit, Chao Phraya, or Sathorn areas preferable) which offers "locals" day access to their pool? For a fee of course. My schedule has recently changed and I can't make it out of Bangkok to visit the beach as often as I like. I'm looking for a relaxing environment as if I was at a hotel/resort in Hua Hin or Phuket. Because of the relaxed nature, it rules out hotel "pool parties" as they tend to be loud with music and over crowded.

Here is what I have gathered so far from recommendations. I've not confirmed these myself:

-Pulman G (Silom)

-Grand Millenium (Asoke)

-Swissôtel Nai Lert Park (BTS Phloen Chit)

-The Ascott (Sathorn)

Thanks in advance.

Swissôtel Nai Lert Park (BTS Phloen Chit) is probably the nicest of the bunch. Garden atmosphere.