I paid for what we had drunk, and we made our way to a cheap restaurant, crowded and gay, where we dined with pleasure. I had the appetite of youth and he of a hardened conscience. Then we went to a tavern to have coffee and liqueurs.

对于crowded and gay, 这个是描述restaurant的主补吗？不能理解的是gay, gay一般是人作主语，表示开心的意思。现在用restaurant作主语，怎么理解呢？