Hi bro
There are some few place near the causeway for you to consider, as below
1 ) Grand Paragon Spa - About 5 Minute from Customs. Good place for SPA, relax, jacuzzi , food and girls. Parking is easy with Metro Parking.
2. Blue Wave - This is the old school in JB , long time already operated, the Spa at Level 6. Some of the girls service is good . Very near to Customs, you can just walk .
3 ) New York Hotel Spa - If you prefer some local Chinese from Ipoh , this is the place for it. Hit it . Good place, good service. Some can even lick you ass.
4) Pelangi Area - So many massage parlour, 90% of this shop have packages. You can check this out