“I keep it always full of interesting people, night and day. People who do interesting things. Celebrated people.”
Gatsby is under the flawed impression that by surrounding himself with material goods, whether they be purchased friends, cars, or an expensive house, he will someday become fully integrated into the upper class. The “interesting people” may refer to the party goers, who lift Gatsby up through their admiration of his wealth and generosity, or to the variety of servants that also inhabit the vast mansion.
Worth noting the commodification of ‘people’. Gatsby is terrible at relationships because he largely sees them as another commodity/ trapping of wealth. A cheap way of securing prestige is to affiliate oneself to prestigious persons. That Gatsby thinks this is enough to validate himself suggests a naivety that borders on callousness.
To help improve the meaning of these lyrics, visit “The Great Gatsby (Chapter V)” by F. Scott Fitzgerald and leave a comment on the lyrics box