Hi Firsttimer,
Excellent advice here, read carefully the advice of experienced guys like Prolijo and Ding Dong, as they really know what they're talking about.
As you're in a hurry, I won't repeat the old "read the forum, friend" mantra.
You probably haven't figured out yet that HDR is Ground Zero, but that many of the hotels suggested here are within a very short walking distance to the HDR/BM: Morazan, El Presidente, Hotel Gran Via are all within a stone's throw of the front door of the HDR...well, at least within a few blocks.
Others, like the Sportsmen's Lodge and Amon Plaza are a little farther away, but are still within a $1.20/500 colones cab ride.
Working girls are found all over San Jose, and as you will learn quickly from reading this forum, quality and quantity vary widely from time to time at each location. You can also scout for love at the Monkey Bar, New York Bar and other traditional pick-up spots, including the Key Largo nightclub (right across the parking lot from the HDR). You can find a sort of massage parlor/bar hybrid in Bar Iden. Highly-reviewed nightclubs such as Kamur, Pantera Rosa and La Grillion give you a chance to see the ladies with less clothing, then make a date with the chica of your choice.
Regardless of where you stay, if the hotel is chica-friendly and doesn't charge a ridiculous "guest fee" for bringing a chica to your room, you'll be fine. One other hotel that hasn't yet been mentioned here is the Europa (downtown, not the Radisson of the same name), the Hotel Castillo and several others. Check the forum to find out if others have described a particular hotel as "chica-friendly;" some hotels near Gringo Gulch are not.
Read, read, read. Use the search function and read some more. Then, if you have more questions, go ahead and ask.
BTW, you'll find lots of chicas who aren't ticas. You'll find nicas, colombianas, and dominicanas and cubanas. "Ticas" are Costa Rican native chicas.
Hope this helps. If I were you, I'd try to get a room at the Presidente; very close to the action, nice modern place, really great cafe, and chica friendly. Great newbie spot, which is also favored by many board members here. Good luck!