Always use a taxi driver that you know and have him wait.
I have heard and read this many times when people talk about going to strip clubs or Casas in unsafe areas. I am in the camp that thinks this is unnecessary. Every strip club I have ever visited always has cabs waiting outside. As far as the casas are concerned you can have the madam call a cab for you, but to me that is not even called for as for the most part casas are open in the daytime so I always walk to the corner and hail a taxi. Now if you are talking about hiring a guide with a taxi, then that is a different story. You can let him wait all day for you outside and that makes sense. Also if you are with a group of guys then that cuts down on each persons share to pay your waiting driver, but then with a group with you I think your security is much enhanced, and again not needed.
Talk about trying to blend in. How many natives have cabs waiting for them?
Of course I am talking from my viewpoint, which I have seen first hand how many of these so called dangerous areas have lead me to have the best experences. Surely my advise is not for the faint of heart or those with money to burn, as most of the time you invite the driver in for a beer or two thus adding to your expenses for the outing.
There are plenty of tips for being safe in Country that have been posted many times that I feel are very worthwhile. Having a driver wait for you to me is a unnecessary expense.