You may see pairs of folks in the garb shown in the pic below in the main downtown area:
Two weeks ago they started providing service to tourists. They are NOT the same as the timeshare sharks in the airport.
The writing on the back of the shirt says "Tourist Security" which is confusing.
I believe that they are affiliated with the Tourism Board but may be mistaken. Actually it is Grupo Elite De Seguridad Turistica (G.E.S.T)
So if you are walking around and want to know where to find something, and no white-legged guy in knee-high black socks is around, ask these folks.