My recommendation:
Bangkok, Nana Plaza at Soi Nana. You can stay at Nana Hotel where they are very "guest" friendly at no cost.
Pattaya, Walking street. I Recommend Flipper Lodge, cheap clean with nice pool at the top. Guest friendly.
Phuket, Patong, cocktails & Dreams.
Will update you in a couple of days as I am iin Phuket now and will be going to Bangkok wednesday.