The Cat and the Wizard by Denis Lee, illustrated by Gillian Johnson

From chapters.ca:
What happens to a wizard when nobody wants him or needs him at all? The Cat and the Wizard tells the story of a lonely wizard and his unwanted bag of tricks. One day, in a laundromat, he meets a jet- black cat with a spiffy hat, a heart full of hospitality, and no one to share it with. Together they retire to Casa Loma, where they embark on a magical evening of candlelight, tuna fish, and wine. They juggle with sparklers and turnips, flautists and butterflies' wings. The party last until dawn. Dennis Lee's rhyming extravaganza is matched by the glorious, whimsical art of Gillian Johnson. The Cat and the Wizard is a storytelling delight.