By joining this group, you are agreeing to be respectful of local culture and norms. Although Dubai is generally relaxed and open-minded, it is still part of a Muslim country and we are guests. I recommend taking the safe route and dressing modestly.
Ladies: Have your knees and shoulders covered and carry a headscarf with you in case you’ll need to cover your hair! Generally, avoid clothing that is too tight, see-through, etc. At the beach/hotel pool you are more than welcome to be in swimsuits and beach clothing!
Men: Men have it easier and most outfits are appropriate, I would avoid tank tops and inappropriate slogans.