If the OP is charging per service rather than by unit of time (maybe for a quick blow and go or gloryhole type service) then I daresay she'd be more than happy to be known for it since very few people do it, so just assuming that she's asking because she wants to rip punters off is a bit lazy.  Not everybody works the same way, and I know if I was doing it this way I'd be wanting to get as many through the door as I could .

That?s fair, Amy. I hadn?t considered that.

Well obviously the easiest way to operate a gloryhole service is to say hi and then get a bloke to do it while you put your feet up with a brew and a packet of fig rolls .

Well obviously the easiest way to operate a gloryhole service is to say hi and then get a bloke to do it while you put your feet up with a brew and a packet of fig rolls .

Hahaha x call it a kit kat and I think I?m on to a new business plan.

After reading more comments on this one I realise the OP might have meant how to get him to cum when nearing the end of his time.

Still not sure if that was the intention but when this happens with any of my clients I will keep trying anything which may do the trick and that includes all suggested by others and a few tricks of my own, but if none work then I don't worry. Giving him a few extra minutes may do it but if not I do not class it as my problem, it is his. He should pay for longer.

To be fair sometimes I get a guy and he's just an absolute pig he makes me feel uncomfortable as Fuck also and I give them the harsh handjob technique. I literally jerk them so hard there Dick will fall off if they don't cum. It's how I don't offend them by asking to leave and still give hem what they want and they don't call me again after that. It's a strange technique but something that has saved me any repeat bookings being made by arseholes.

Hahaha love it thats funny

Every dick is worlds apart! You either spend ages trying everything, or you ask the client how they want to be touched/fucked.

I think there is a big difference to wanting a man to come and leave in the first 15 minutes of an hour booking and trying to get him to hurry up towards the end, especially if he's annoyed and mauled at you for nearly an hour. I can't be the only one who wills some of them to come just so he'll stop speaking/leave! Am I the only one who has yanked away at a cock in revenge for his rough treatment of my clit?! 

Anyway, I think we can do our best helping a man to come and it's sometimes worth asking What will do it for you because sometimes they can be helpful by asking you to talk dirty, play with yourself, call them daddy, shove a finger up their arse or whatever, but I think it's tricky to do these things unless you know them because you don't want to horrify them and put them off completely. Essentially they have to take a bit of responsibility, they know themselves and what turns them on so they need to help us by either accepting they won't come in X amount of time or need something more kinkier to get off.

I also think a lot of men have what I call Wank Hand in that they have spent so much time wanking their penis is programmed only to respond to their particular grip and just can't come any other way.  If things aren't working I will sometimes say why don't you wank over me/come on my tits and let them do it themselves. The combo of them doing it their way and getting to come on me often works a treat!

I?ve now had a guy see me 5 times for half hour bookings and he has not cum once. I must be doing something so wrong its right 

LOL I know what you mean! I had a bloke exactly the same. On our first session he brought a flash bottle of Champagne and went on in our subsequent meetings to lavish me with gifts of high end beauty products and even arranged a spa day in some salon in Notting Hill. He did all that despite me being unable to make him cum  no matter how hard I tried.
Eventually I realised after several meets  blow jobs and penetration were not doing anything for him so on our final meeting (yes he never booked me again after this) I decided to try something a bit different for him and gave him an oily handjob which thankfully gave the desired effect. I thought after him spending several meets unable to bust his load he would be happy but he became really off with me ....goes to show you can't please everybody!  I do miss the bottles of champagne and Molton Brown beauty products though. Lol.

Anyhow back on topic i find doggy style to never fail when aiming for a final cum. Also talking dirty which is not my thing but if we are nearly at time up I find a few filthy words can get a bloke cumming a bit quicker.