For a fun excursion, do as the young Genevois do and head to Carouge, about 2 km south of the center of Geneva. Carouge is a bohemian, artistic suburb; to get there take the #12 or #13 tram for a 10 minute ride across the Arve River to the Place du Marche.
In the 18th century the Arve marked the boundary of Switzerland; the Carouge area was owned by the King of Sardinia, who ruled from Turin. In an effort to create a thriving center of commerce to rival Geneva, he invited Catholics, Jews, and even Protestants unhappy with the strict, Calvinist environment in Geneva to populate and grow Carouge. Planned by Piedmontese architects, Carouge is more Mediterranean in look than the rest of Geneva but joined the Canton (province) of Geneva in the early 19th century.
Today, Carouge still has the feel of a small village, full of small artisanal and trendy shops (check out the Rue St.-Joseph), restaurants, bistros and cafes, and good nightlife. The Place du Marche hosts a market on Wednesday and Saturday mornings.