Cacoon Stay is amazing place to dive deep into Korean lifestyle. It is located near hapjeong station, just 15 minutes away from Hongik University one of the Seouls party places. There are malls, markets, parks around. And host will explain you everything around, so you will experience of you life in Seoul.
Job itself is easy,: cleaning, making beds, socializing with guests, nothing unusual for volunteer. Again you will be trained by manager or other volunteers at the beginning.
Another great part of staying in Cacoon is that: owner provides 2 meals which is rare, at least in my experience.