Looking for public worldwide (not restricted to US only) ongoing test meetings

Hi everybody,
I'm looking for free public meetings for testing ZoomISO and Ecamm Live (and lately Ecamm for Zoom.
Just need remote participants video for testing spotlighting, switching between "virtual stage" to breakout rooms and back... all for producing better virtual events for my clients. I can sign in with 4-5 test accounts of my own, but some tests need a mass of participants.

There is  on.zoom.us  buy it is for US accounts only.
Is there something equivalent for worldwide use?

Thanks