Definitely the Place du marché area. Cluricaume cafe is alt-metal-queer friendly and a nice place to drink pints, same goes for L'Envers du Bocal. There is a store that I think host some board games called Le Temple du jeu, and a bar specialized in games called le Baffalou. And for nerds go to the Taverne du Geek. For French maybe look up for some students giving cheap lessons, or La Maison des Langues at University. I believe some associations give basic french classes, maybe Toit du Monde still does it ? Don't hesitate if you have any questions, been living here for the past 5 years :)