The Year Of The Flood by Margaret Atwood

In a world driven by shadowy, corrupt corporations and the uncontrolled development of new, gene-spliced life forms, a man-made pandemic occurs, obliterating human life. Two people find they have unexpectedly survived: Ren, a young dancer locked inside the high-end sex club Scales and Tails (the cleanest dirty girls in town), and Toby, solitary and determined, who has barricaded herself inside a luxurious spa, watching and waiting. The women have to decide on their next move--they can’t stay hidden forever. But is anyone else out there?

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*a bit of weathering