The Great Gatsby, "the racy, adventurous feel of it"

Could you please tell me the literal meaning of "racy" the expression "the racy, adventurous feel of it" in the following excerpt of Chapter 3 of The Great Gatsby?

I began to like New York, the racy, adventurous feel of it at night and the satisfaction that the constant flicker of men and women and machines gives to the restless eye.

Thank you.