Well a simple one would be Mystery`s ESP trick, where he would make a girl choose a number between 1-4 (people usually choose 3), or 1-10 (usually 7). Use that to DHV, and if the girl starts going " Oh do that again, do that again." Simply don`t you`ll end up looking like a performing monkey, so simply say "Wow girl calm down i`m no performing monkey, how bout you show me something interesting now." Its what i usually use to get girls to qualify to me, and learn new routines.
-Hope that helps Fate
(PS. Almost forgot if u want to see how magic is used in pick up i suggest you should check out P.U.M.A- pick up magic artist
http://www.blogcatalog.com/blog/puma-sk ... gic-artist)