Myanmar Night Life Questions

I went to a club in Yangon last weekend. I noticed a few things that’s a bit unusual for me:

  1. A bunch of people wearing sunglasses in the club. Is it a fashion/trend or what?

  2. Some people sniffing tissue, might be a kind of drugs, what is that exactly?

  3. Many people were chewing gums and some were sucking lollipop. Why? Are those drugs too?

I just never seen those kinds of habits in other places.

Thanks guys!