Should I use light or dark backdrops?

I am wanting to take some photos for a party using a backdrop and soft boxes. The backdrop will only be able to fit around 5 people, and I wont be able to have the subjects standing far from the backdrop, they will most likely be standing close to it.

I am thinking of using a dark backdrop and creating "photobooth" like photos, they'll be using props

I also had an idea for them to use their own phones on a ringlight stand.

The photos will be taken without natural sunlight.

Would using a dark or light backdrop make the most sense for this?