Thanks for the comments all. We have a dare that doesn't involve our male friend directly this time, but indirectly.
She took these pictures for him, lifting her skirt so he could get a good glimpse of her pussy.
And as soon as we see him in person again, especially with others, she will secretly ask him to open up his phone and show her the pictures while she rubs him.
Each token is about 5-10 cents and you can tip 1 or as many as you like. Every token amount has an effect of some kind on the performers."
The tokens vibrates the toy remotely which is usually already inside the woman. So your 5 cents makes her shiver. After awhile, she does something extra (sexy) special ...