I'm single so I don't worry about a significant other. This is somethings I do even if I'm not seeing a well reviewed lady.
I look to see if she is a regular advertiser on whatever venue she is advertising on. I figure a sting operation can't go on very long with the same number before the word would get out and it won't work for LE anymore.
When I call her up I never mention sex or sexual activities. I say I'm and my first name. I saw your ad on the internet (or name of paper or type of place I got her information) and I'd like to make an appointment to see you. How much will this be if they haven't posted a rate.
Notice I never say appointment for what. It could be for a stereo for sale, to get her to model, to make a date or anything. Also if there is something wrong with the number or my dialing I don't accidentally get ahold of the local moral majority member.
If it is incall she'll either give you a street she is on if she is working out of her home or the hotel she is in. You'll have to call her again when you get there to find out where she exactly is. I kind of look the area over for anything that just doesn't seem right. Mostly I don't want to get in the middle of something accidentally that would cause the police to talk to me like a car accident.
When I get inside, if I have to talk about money I never discuss for what. When she says to get comfortable she means get undressed. I usually just take the money out of my pocket and lay it down near my phone which I also take out of my pants just like I'm emptying my pockets to take them off. That is all I take into the meeting. Money and my phone. I want nothing that I can accidentally leave behind or have stolen. I have a car I can get in with a number pad so I don't even bring my keys.
If she started to try me to ask how much I'd pay for this or that I'd leave.
Your chances or running into LE is very limited. I'm near a medium sized city and they bust maybe two women every 2 years or so for prostitution. The last two I read in the paper about being arrested showed up on the radar for other reasons that we don't talk about here.
Looking at this site
http://www.chicagopolice.org/ps/ it lists 39 people with arrests involving prostitution. From the number of cars impounded, it looks like it was mostly, if not all, for street prostitution. To put this in perspective. there have been 32 murders in Chicago so far this month. I think you chance of getting arrested is just about nil if you use any common sense at all.