Most escorts in countries such as America simply do it as their full time job. However, in Singapore, most social escorts (e.g. or from registered local agencies such as https://www.instagram.com/richardvip/) have another job or are students in the day time, and simply work as an escort in the evenings as well as weekends.
As Singapore is a much more conservative country than Western countries such as America, most girls are not keen in letting their family, friends or employers find out that they are working also as a social escort in the evenings and weekends. Even though being a social escort is very different from being a prostitute, as no sex is involved as part of the service, most girls are still shy and prefer other people not to know about this.