I have observed several different levels of precaution observed by SGs:

Two condoms - to be double safe.

No, a thousand times No, Not without a condom.

No, but after you become a regular customer, for more money.

Always available, but it will cost you a lot more.

If you buy an hour, without a condom is standard.

(The first time); Well, I guess if you having trouble coming,
you can take it off.

You can pay me extra whatever you want to.

She lays the condom on the bed, hoping you'll want to use it.

She provides a condom on request.

She doesn't have a condom, neither does the hotel.

She wants you to come in her ass (No condom available).