Singapore has a surprising amount of open space/parks, but it's basically densely populated and urban. "Getting out into nature" is not something that most people do (one reason 90% of Singapore's youth require glasses: lack of exposure to natural light in youth causes myopia).
B and I really like nature and hiking, so we've been to most of Singapore's parks; they are usually mostly empty, and when people are present, they are often (white) foreigners. This may be because white people love the outdoors, or just because Singaporean natives are too smart to trudge around outside in 80+ degree weather with 100% humidity when there are lots of perfectly good air conditioned malls.
A few people do want to experience the great outdoors, so they go camping. The park across the street from our house has a campground, pictured here. It's strange because it's about 50 feet from bathrooms and a large McDonald's, and a short walk from a major highway. Yet every weekend, people are there in their tents, experiencing the fun of 'roughing it', Singapore style.