If you are looking for leads and sales, then you need to go to where the customers are. If your target is outside of "tech" -- and face, most of the world is -- then you need to go to the conferences that your customers go to. Even if you are focussed on tech, make sure you pick the right conferences! You can leverage your existing leads to find out where their peers hang out.
I see far too many people going to "Startup Events" to look for leads, the reality is that those events may be great for ideas, inspiration, etc, they will not help you acquire customers. (The only exception is if your customers are cash-strapped startups.) As a founder with a technology background, I find a simple rule serves well -- to find customers, only go to conferences I would not normally want to attend! And when attending the events, it is important to keep your goals in mind -- which I'd suggest being building relationships, NOT selling. People get put off by having people walk up and try to sell them on something, but they love talking about themselves and their problems.
I hope this helps.