A Huff Den is a building where kitten huffers congregate to huff kittens. Huff dens are usually in the basements of apartment towers, as well as some nightclubs and grocery superstores. Huff dens are quite common in Eurasia, as kitten huffing originated in Central Asia. They are, however, increasing numbers of dens in North America. These dens occasionally serve monkey, puppy, and squid, as well as kitten. Monkey huffing is easier, and more affordable, than kitten huffing, monkeys being smaller and less vicious.