zoo at night?

last night, ari sent me an sms from Singapore, telling me that he went to the Night Safari with a bunch of people. what is a night safari? i asked. he said, it’s a zoo-ish place but you go there at night.
i couldn’t really imagine going to a zoo at night. i mean, would i be able to see the animals? but ari insisted that i should visit there and have a date there. a romantic walk. he said, it’d be wonderful.