Metal music event in Tokyo

Hi all,
I am trying to organize events where people can talk about their favorite music/bands (mainly metal or those heavier ones), jam together, and connect with new friends with the similar taste in music.
I have been attending METALUP events I found on Meetup app (https://www.meetup.com/metalup) in Osaka and it’s been such a fun experience so I wanna do the same in Tokyo.
Eventually I want to have small live shows regularly so musicians can get a chance of playing cover/original songs in front of people.
But I’m not sure how many people are actually willing to show up so I wanna know if there are any of you being interested.
I’m hoping to get a rough number of people attending so I can find a venue with the right size.
Also if you know any bars or venues that hold similar events please let me know!
TIA 🙂

by Background_Net_5808