Questions about Gangbang scene in Munich

Dear lusthaus Friends,
I am Male 30 & new to munich and speak only english :) for now
I was looking for Gangbang scenes in munich and ended up here at lusthaus.
Since i am using google translate , I could understand some information here on lusthaus but not all.

I would like to know following , any help will be much appreciated.

1- Where are gangbang events currently in munich (August till September)
addresses , weblinks inside munich only will be great help

2- What are general rules for gangbangs ? for exmaple
How many programs one can do ?
What are prices
is any thing taboo/prohibited ? like anal and so on

3- I am really new in Munich and it would help to know some friends with whom I can go gang-banging and other sexual stuff. I only know friends from office for now and cant discuss this stuff there :(