I've been to Patong and Hua Hin as well. JMO but I found that Patong was a bit too crowded (December) and 'commercial'. I have been back to Hua Hin twice since, there are around 60 bars providing ample opportunity to locate the right girl

Most of the hotels are girl friendly, avoid the 4 or 5 star places like the Hilton or Sofitel, although I have heard that a generous tip can even get them in there. The atmosphere is a lot more laid back than Patong, but I works for me. A good site for HH is:
http://www.huahinafterdark.com/
there are bar reviews, and a good forum there to answer many of your questions.
Cheers