Bohemianism

Édouard Manet, At The Cafe, 1878
Wikipedia - "Bohemianism is the practice of an unconventional lifestyle, often in the company of like-minded people, involving musical, artistic or literary pursuits, with few permanent ties. Bohemians can be wanderers, adventurers, or vagabonds. The term bohemian, of French origin, was first used in the English language in the nineteenth century to describe the non-traditional lifestyles of marginalized and impoverished artists, writers, journalists, musicians, and actors in major European cities."
Wikipedia, Evolution of Bohemia