I am a member of the Church who goes to San Pedro regularly. The Church is meeting in a rented house that is quite a way south of town, down by the Seventh Day Adventists.
The Branch Pres is Albert Lammey. The RS Pres is Sarah Williams, wife of Henry.
The building is yellow. The Church meets at 9AM on the third floor. Steps are in the rear. Most who come arrive by taxi.Most taxi drivers can find it and will get you there for $
I have a cell phone number for Sarah, but don't want to publish it. If you need more info, the clerk at the Hotel del Rio named Roberto who works evenings knows Sarah and how to get ahold of her.
Where are you needing to come from and maybe I can help you more.