Smile. Really try to connect with them. Also, even if you limit some of the styling, try to dance with them to the music as much as you can, without interfering with his lead. At the same time follow smoothly whatever they lead, even if you think its wrong. This will show them more than anything that you respect their effort in their dancing and shows them how to dance well by *example* and how you would like them to dance with you. They will quickly work out what they're doing wrong or ask you because you seem so friendly. Don't criticise or correct them unless they ask you. If you do give advise when requested, do it off the dance floor. It's for dancing and having fun! The above advice will help more than anything for you to become a very appreciated dancer and at the same time help leaders in their growth.