» Sat May 28, 2011 11:00 am
This solution may seem far fetched, but try it. Find an Old Cowboy Hat. One can be purchased from Mick and Ralph's or from Blake at the Crimson Caravan Company. Put on the old cowboy hat and try to enter the Strip again. If this works, simply keep the hat in your inventory and put it on before entering the Strip in the future.
I had this same problem, and it seems to stem from a glitch in the quest from the Atomic Wrangler, namely the end where you kill their former bouncer and turn in his hat, which shares the same model as the Old Cowboy Hat. The above solution worked for me.