If invited into the home of a man in Singapore. Muslim societies do not use your left hand to eat or pick up the things. To others. Includes not using the left hand to greet and shake hands.
If you are invited into the home of any person in Singapore. In a society of Muslims do not use the left hand for eating or giving something to others, including not using the left hand to greet and shake hands.
If you have been invited to the house of a person in the society in Singapore Muslims do not use left hand to eat or things to pose with other people as well as with the left hand was not in the greeting and shook hands.