 How does Retief first manage to arrange an interview/interrogation with Groacians officials?
I "The Consul for the Terrestrial States," Retief said, "presents his compliments, et cetera, to the Ministry of Culture of the Groacian Autonomy, and with reference to the Ministry's invitation to attend a recital of interpretive grimacing, has the honor to express regret that he will be unable—" "You can't turn this invitation down," Administrative Assistant Meuhl said flatly. Retief backed into the opening to a narrow crossway and offered further verbal familiarities to the drunken local, who followed, furious. Retief backed, rounded a corner into a narrow alley-like passage, deserted, silent ... except for the following Groacian. Two Groaci wearing heavy eye-shields and elaborate crest ornaments indicative of rank rose as Retief entered the room.
 He gets into a bar fight, prompting an investigation and thus a visit from a Groacian government officials. Retief flips their interrogation when he begins to ask them the questions he needs answered.
 Retief tricks Miss Meuhl into luring Groacian officials to their office. Once they arrive, Retief blackmails them with information he stole from a bar tender.  He gets into a bar fight, prompting an investigation and thus a visit from a Groacian government officials. Retief flips their interrogation when he begins to ask them the questions he needs answered.  He breaks into their place of business and demands he be met. At first the receptionist doesn’t let him in, but eventually breaks.  He steals vital information from the Groacian archives and plans to use it for blackmail. Then he gets into a fight with a police officer, prompting Groacian officials to visit his office. He blackmails them for info when they arrive.