I get really nervous when I go to the places and I want to do some magic for people, and I don't know how to approach people to do a trick. Any advice?
could pressure also be used as a ice breaker?
you'll probably get the best results by introducing yourself and gaining enough respect and rapport for them to happily hand over their phone for you to use. Rather than waltzing up to them launching straight into the magic, and demanding their personal items for your use.