The rest of the Straw Hats were out in the island gambling, Robin was just sitting on a chair drinking some Wine, she really didn't have any interest in gambling or money, but she let the rest of the crew have their fun. Grand Tsoro was really the City of Gold, a luxurious island of course, everything was covered in gold.

Nico Robin: "Oh, hello, who might you be? I could have a little chat, I'm bored out of my mind."

She smiles.