How lovely! The heat is currently ghastly, but you will soon be very wet, I think. There's an extra-long Songkran holiday this year, to encourage tourism so be prepared to have water sprayed on you whenever you're outdoors. Are you there for work?

I highly recommend the At Ease massage chain, if you're anywhere near the BTS. All their places are very close to Phrom Phong station.

Unfortunately I won't be anywhere near there until at least the middle of the year.