See also: Part I & Part III.
Exterior shots only, remodeled for the film.
Source: Travel Happy
Alan plays pac-man and eats an ice cream cone while Stu figures out where Teddy is.
The boys head to the monastery in hopes of getting a monk to talk.
The interior of Siam Sam's is rumoured to be filmed here, or in LA in a set modeled after Tilac's real interior. Either way check out this youtube video from the inside of Tilac to see the similarities.
The exterior of Siam Sam's was a remodeled for the film, the changes might become a permanent fixture.