Freelancers may operate out of a nightclub or cafe, and may work what appears to be a regular schedule, but they have no obligations to their chosen location and may come and go as they please. Prices and time are completely negotiable at the discretion of the girls.
Club girls are like freelancers in that their price may be negotiable, but they differ in that club girls usually have a set work schedule at their place of employment. Extended or overnight sessions with club girls may require an additional fee paid to the bar or club. In addition, cover charges/drink minimums and girl drinks should be factored into your budget.
Escorts normally advertise in print publications or online via escort websites. Figure photos are almost always available and sometimes face photos are available. One must realize, however, that online photos are typically touched up or years old and that the girl that will arrive is unlikely to look as good in person. Care should also be taken in researching the reputation of the site or publication where the advertisement appears. Bait and switch, where a completely different girl shows up, is relatively common in the escort business in general. Prices for escorts are typically advertised up front and are generally more expensive then freelancers or club girls. Both incall and outcall are often available. Incall takes place at the girls residence, outcall takes place in your hotel room or in a short time motel/hotel.
Below is a map. While there are many places to pick up girls scattered throughout the city, I will only be focusing on a few as shown by the red boxes. I recommend first-timers stick to these places unless you're already the experienced, adventurous type or you have an extended stay in BA and plenty of time after exploring the basics. Design Suites and Etoile are identified by the red dots, and some important roads are shown by the double ended arrows.
Recoleta will probably be your primary playground. Many excellent restaurants and a movie theatre populate the area and a number of clubs are within short walking distance. The popular clubs in this area are as follows: Blacks, Affaire, Newport, Salome, Solid Gold, and Playwoman. There may be a few more, but these are the most popular ones. Be aware that Recoleta (as well as most places) don't get kicking until late (10pm or later) so if you want earlier action you should have some escort phone numbers handy or head to Cafe Orleans.
Cafe Orleans is located at the intersection of Cordoba and San Martin, just a block away from a very popular shopping strip. It's a small cafe where working girls hang out. Just around the corner is a club called Cutty Shark. El Verde is right there across the street as well.
Suipacha is several blocks away from Orleans up Cordoba. Here you'll find three clubs practically right next to each other. They are Hook, Ness, and Cattos.