Yes, Era is early Reason.
Given that Riverton is the largest city in the surrounding area, I would expect B's workshop to be somewhere in town. However, he might like his privacy and thus, has it elsewhere? As to why he might be staying at the Inn? Perhaps the mysterious goblin had met him for dinner and drinks before Bronn overheard his conversation with the other companion? After dinner the goblin offered to put Brindlglib up for the night?