Here's a dare we did because my wife just got some new lingerie and wanted a quick photoshoot before I ripped off her bottoms and slowly inserted a new vibrator she got =]
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 ...