I am a bi ual girl new to london. Where is the best place in london to meet other bi girls?

I am looking to meet other bi girls in london. I thought about going to a gay bar but was in once, and it its packed with older or butch women. I am a very feminine girl in my 20s and would like to meet someone similar. Wasn't able to put an ad on gumtree cos the section was closed before I got the chance. Am not looking for a relationship hence why i dont want to date someone who's gay cos it happened once and went really wrong. Just want someone fun to hang out with and have some flirty fun with. Where would you recommend?