It is unfortunately something we still have to deal with. It can be very individualized. As in, will this particular potential boss care? You can't know that ahead of time. I don't think any one industry has more of a prejudice against pole than any other, but ones that involve children tend to stay on the cautious sceptical side. Having a separate pole facebook is one way to keep your personal pole life hidden from your professional one. If you'd like to keep your photos on your facebook, you might want to be forthcoming with the potential boss. Bring up the subject first so that you can explain it on your own terms instead of them scoping you out and finding it on their own as a surprise. If you hide it from them, but leave it out in the open elsewhere, they may get an instant negative feeling. If you bring it up as something that you feel should be discussed and explain it rather matter-of-fact, hopefully they will see it for what it really is, instead of the stigma. They may accept it, or ask that you keep it to yourself in front of the children and parents, obviously, or they may dismiss you entirely so as not to risk potential parental confrontation. It will be entirely up to them at that point.
I guess what I'm saying is, it is always a risk. Do you want to take that risk so that you know you're working for an open and accepting boss or company? Or do you want to avoid the risk altogether? If it were me, I'd come out and talk about it. If I'm not to be accepted for who I am, ALL of me, then maybe I don't want to work there anyway. But see that's just me and how I am! You can choose to go the cautious route too.