However, I should note that as a technical cofounder attending these events, I've been approached and flirted with heavily by single female entrepreneurs who have ideas they haven't started building yet, who seem to be looking for a convenient all-in-one package of "a boyfriend who's also an entrepreneur, who can 'yes, and' my ambitions, and who has enough skill+experience to actually build the tech side of the things we imagine together." I'm neither single, nor a free agent business-wise, but some people can be both very pushy and presumptive.
The first step is always getting to know the other person. Hitting on the other person with romantic interest from the start is a sure way not to get to know them in a low pressure environment. If you get to know the other first, they also get to know you. Typically you'd be searching for someone you are willing to spend your time with, and who is willing to spend time with you. And this is only a feasible endeavour if you know them and they know you.
That means: Your goal is not to find someone to "hit on", your goal is to get to know people. You can still explore if the other is interested in a little bit more, once it is established that you find them interesting and they find you interesting.
I think people are going to be weirded out by someone hitting on them at a business event.