The Lavoir opened its doors in 2012 but is already an institution of the alternative cultural…read morelandscape of the Croix-Rousse... and Lyon in general. They do a mix of parties, theatre, exhibits, take part in festivals - all that at reasonable prices, you pay a 2€ membership fee per year because it's an association plus either pay what you like (often for parties) or a set ticket price for plays etc.
The venue itself is worth going for, a former public wash and bath house, still complete with vats for washing clothes and an industrial feel.
The monthly Arm Aber Sexy party is great (first Saturday of the month), the people are a queer-hetero-hipster-alterno mix, which makes for a great atmosphere, the music is often good, ranging from electro to disco-ish. Absolutely recommended if you're looking for a queer-friendly party with a laid-back, dancy DYI feel (the drink selection is small but cheep and the speakers sometimes die at the end of the night) and you don't mind an early night (they close at midnight because of the residential area).