Whenever you visit an escort site, you will see an option for 'incall' escorts. This is where a male or female escort requires you to visit them, instead of them coming to see you.
The men and women who work as incall escorts do so due to issues with security. They are much happier in their own property, or in a hotel room where there are other people knocking around. Many incall escorts feel that with 'outcalls' they could be going to somewhere which isn't safe.
You can find on this webpage 31 Incall Escorts sorted by cities.