From Goodreads:

A deeply romantic evocation of gay life, this stunning first novel by celebrated British gay writer Neil Bartlett gives a tender, erotic, brutally explicit portrayal of love between men. In a dark corner of the best bar in the city, two lovers fall into each other's arms. The bar has been called many names, but it is now known simply as The Bar. Its proprietor is the aging, still glamourous Madame. Its clientele is gay. The two who fall in love are Boy, a beautiful nineteen-year-old, and the handsome, forty-something "Older Man" referred to as "O" by the regulars of The Bar. This is the story of Boy's and O's courtship and marriage, of Madame's role in the affair, and of the man called "Father," who threatens to come between them. Searingly honest in its deception of gay culture and ritual, this gripping novel is at once a moving celebration of love and a stark picture of life for gay men today.