Describe Nick's initial meeting with Gatsby and his impression of Gatsby?

From the text:

The nature of Mr. Tostoff’s composition eluded me, because just as it began my eyes fell on Gatsby, standing alone on the marble steps and looking from one group to another with approving eyes. His tanned skin was drawn attractively tight on his face and his short hair looked as though it were trimmed every day. I could see nothing sinister about him.