Hey! Mandala meditation is one of Osho dynamic meditations. I'm not very fond of this particular one (here you can read about the sequence of actions http://oshomeditationstudio.com/portfolio/osho-mandala-meditation/), but for example kundalini is great (http://www.osho.com/meditate/active-meditations/kundalini-meditation). These are meant to be done in a group and it's an extremely quick way of stress and anxiety relief, it reaches out very deep into you. It was a life-changing experience for me and I recommend it to everyone. I will write about it in more detail one day to shed more light on it. Unfortunately when I left Latvia, I stopped doing it. I've seen some meditation centers in New York City, but all of them seem slightly shady and/or in an inconvenient location. But one day I would love to go.
As for the meaning of my name - had I known you when I was writing this, I would've asked to confirm, but the most popular belief in Poland is that my name is derived from that word. :)