It was quite easy to get Korean SPs to your place if you have a karaoke machine at home and stock up your fridge with Soju and beers. Most of the Korean SPs on visitor visas were quite lonely on their day off and always looking for someone to hang out with. If they think they can trust you, they will come over to your place and hang out with you.
A few yrs back, one Korean SP from a non Asian agency working from Hilton on hwy7 used to come over and spent the nights with me after she finished work at 10 pm. She said she hate sleeping alone at the hotel and needed someone to talk to and cuddle with. My place was just 5 minutes walk from where she worked.