seriously.. it's part of their "service" 
check it out => BBC News article
here's an exerpt:
Chinese 'anger bar' is a big
hit
A bar in eastern China has come up with
a novel way of attracting clients - they are allowed to beat up the
staff.
The Rising Sun Anger Release Bar in
Nanjing lets customers smash glasses, rant and even hit specially
trained workers, state media reported.
The owner, Wu Gong, told China Daily that he was inspired to open
the bar by his experiences as a migrant worker.
Most of his customers were women working in the service or
entertainment industries, he said.
The bar employs 20 men who have been
given protective gear and physical training to prepare them for the
job.
Clients can ask the men to dress as the character they wish to
attack.
