There are a multitude of badminton interest groups in Singapore, for a myriad of age groups and competency levels, where people can come together to play a game or two.
Some can be found in the many SBA affiliated clubs, and a few can be found online here:
Racket Community is a group of badminton players who loves badminton with all their heart. They are always looking for people to join them so they can meet new players and make new friends. They play weekly and give away free drinks (100plus or Milo) to players for every game.
Remember to keep yourself safe when meeting up with new people, warm up before playing, hydrate well when in court, and cool down properly after your games… but most importantly, be sure have a good time!