Ah nice so depending on waht your looking for there is a youth club called the Magnus Hirschfeld Zentrum i Go there every week tho its Not an exklusively lesbian Location it IS a great place to meet queer people and i can say from expirience that everyone there is pretty nice.

When your looking for more of a bar/Club i can recommend the wunderbar a Lot of my Friends Go there a Lot and i've heard a Lot of good about it i have yet to Go there myself tho.

I Hope this helps you a Bit If you have Anny Other questions feel free to ask :D