Odds are that unless you're in a bathing suit, you'll get in. Enforcement of the dress code is sporadic--at best. Be aware tho that you may possibly run into a "maverick" manager or podium greeter--that just happened to someone at Artist Point, where he was refused entry because his shirt had no collar (he had on a t-shirt). That was the first time I'd ever heard of anything like that happening in a LONG time--.
Should add that we ate at Flying Fish just a month ago.--There, as at all the Signature restaurants where we ate, folks were allowed in with t-shirts and other "non-code" forms of dress.