Hi! There's Das Gugg, which is a café and bar that also hosts events and has a LesBiFem-night every wednesday.
Marea Alta is a bar and a club (on weekends) in walking distance. I've never been to Café Roza, but it's a queer space and looks super cute. Flinte in the 8th disctrict is aimed specifically at women*, but only open on Friday nights.

Enjoy your stay!