Heyo,
I'm an atheist in Singapore and I chanced upon this forum
section discussing atheism!
Just FYI, there are quite a number of such groups in Singapore
already, springing up across the island over the past 4 years. If
you are interested, you can join some of their events. I have
already attended a few myself.
One of them, the Humanist Society (Singapore), was registered
with the Registrar of Societies in 2010. They have compiled a
directory of local atheist/skeptic/humanist groups so you don't
have to google endlessly anymore..
http://www.humanist.org.sg/information-on-hss/local-groups-directory
Humanist Society (Singapore) (http://humanist.org.sg/)
The Humanist Society (Singapore) is a registered society in
Singapore for humanists, freethinkers, atheists, agnostics and
other like-minded people.
Drinking Skeptically SG
Drinking Skeptically is an informal social event designed to
promote fellowship and networking among skeptics,
critical-thinkers, and like-minded individuals.
Singaporean Atheists
Singaporean Atheists is an informal network of Singaporean
atheists from all walks of life. Founded in 2008, they are based
primarily on their Facebook group, which serves a platform for
discussions and also hosting events.
Singapore Philosophy Group
The Singapore Philosophy Group meets regularly to discuss life
and its fundamental questions.
NUS Students for Freethought
This group was set up in Feb 2012 to provide a social and
support network for students in NUS with no religious
affiliations.
Murtads of Singapore and Malaysia
The Apostates in Malaysia and Singapore is a group of former
Muslims in Malaysia and Singapore.
There is a even a wikipedia entry about the non-religious
community in Singapore: http://en.wikipedia.org/wiki/Irreligion_in_Singapore