My family, who I took on a tour of Cambodia, Vietnam and Thailand, were astonished in the breakfast room one day by a Sikh family.
This occurred in Hanoi, but could have been anywhere.
This particular family were extremely loud, rearranging the breakfast room, scraping the tables across the floor, to sit together, and snappy, demanding and authoritative with the waiting staff.
The men kept clicking their fingers for staff to service their needs.
We were slightly shocked, as we had always had the opinion in the UK, that the Sikh people were very polite and friendly.
After they left, the receptionist told us that they were always like that when they stayed at this particular hotel, and treated the staff like servants.
This group didn't smell, but I understand the above post, as I used to get in plenty of Asian taxis in the UK where the BO was overwhelming.
I no longer ride with them. Back in the UK, I do a deal with family members to pick me up and drop me off, and I compensate them for their time and trouble, via petrol and gifts.