
This term is used in adult entertainment venues - mainly in Asia - and defines a fee paid by a customer to allow a prostitute leaving their work before her shift ends or a fee paid to waive her contractual obligation to perform her duty during working hours - usually dancing or performing other tasks such as serving drinks. The term barfine is mostly used in agogo bars, music lounges (KTV) and massage parlors in Thailand, Philippines and Vietnam. It compensates a bar for lost revenue occured during a workers shift in her absense. In the Philippines - where barfines are considered legally questionable - the term might be replaced by expressions such as early work release or special lady drink. The normal barfine fee is usually calculated on basis of 10 times the amount of one regular lady drink.
These days it's pretty easy to find information about prostitution online. Youtube offers videos from private people as well as TV features from around the globe. The World's largest photo sharing portal Flickr.com shows plenty stills of whores online. Check out Ladies of the Night album for a collection of historic photos of the last 100 years. It includes images of Eric Burdon in German brothel separe in the 1960s.