Rush no offence but the response you got seems lucky.
here is one I use all the time. As you may know most HBs work on their abs so all you have to do is wait for your target to get to the roman chair or any other gym equipment used for your abs. do not chase her around with your stare or its ruined she mustnt know you watching her keep occupied on equipment where you have a clear view of her when she does move to an area associated with abs and starts her set you go there...
PUA: hey

dont want to look pushy but are you gonna be here long because I have this strict routine all about eplosive sets and little rest time and I kinda need this spot.
HB:(variation of Im almost done or sure)
PUA If she does offer to leave: No I couldnt do that just finish up ill break my routine but then you have to keep me busy with some small chat
PUA if she doesnt move or offer: I know we all entitled to our own time in the gym its good to see your committed to your work out so you earned the time stolen from me (begin using other equipment, when she finishes walk up to her and ask if she did it so you could see her brilliant body or because she really wants you to see how its done)
100% success with this one enjoy