1. In my opinion, it`s fine. It depends on how are you going to organize it.
2. Hotel,probably. Because, it`s more safer, easier and comfortable.
3. Sure, unite. You can meet new friends and find a bunch of inetresting people, who are sharing their culture.
4. Club-modern style. Famouse groups and rappers, i think. We live in a 21st century, where society is a big deal and lifestyle. A lot of people will come, in that case, so.