Strippers can sometimes be contracted for performances outside the strip club environment. Strippers with ready access to the Internet away from work have also adopted social media and networks as a less intrusive way of maintaining direct connections with customers. Others use the internet to generate revenue by performing via webcam, recording premium content, or running their own subscriber-based web site. Online erotic content is pervasive and generally classified as pornography. Much like activities inside the club, different dancers have different comfort levels for services they provide during private parties. Aside from advertising for striptease services outside the club, an unknown percentage of strippers also work in other aspects of the sex industry. This can include erotic and nude modeling, pornography, escorting, and in some cases prostitution. Outside the U.S., the use of strip clubs to facilitate sex-for-hire is much more common and stripping in those settings is viewed as advertising for sexually oriented business that will be performed in either private areas of the club or off-premises.