Forget about adding seductive/flirty elements into it. I know I have to give out a vibe of confidence and dominance, but I'm not actually aware of the structures of that type of conversation. When I talk to people, usually I wing it, and sometimes it's not very effective. I would like advice on a structured routine approach to striking up a conversation with both men and women while appearing as a confident desirable person to be around.

So what do I say? If I'm at a party and two or three people are conversing, how do I introduce myself and get in? Or if someone is sitting by herself/himself, what do I say to build rapport? It always feels so awkward and forced. How do I make it smooth and fun?