Girls, How can I hang out with 4-6 really good looking girls swimming?

I’m going swimming this summer with up to 6 very hot girls. Sounds like I’m the only guy and I never liked swimming without a shirt but kind of want to because some of them want to see me with no shirt. How do I go shirtless in front of girls?

Updates
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Forgot to ask if girls even care about what guys wear swimming? Like, I’ve lost a little muscle and weight so worried I don’t look as good as before.
Girls, How can I hang out with 4-6 really good looking girls swimming?
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