Don't worry, 30 is just coming into your prime.

Beautiful women are a bit different from ordinary women in that they know every man out there would bang them. They have total choice, so they wait to see who is interested. Most of their interactions with men they have just met are saying "no" one way or another. They really don't need any more of these in a day. So they are unlikely to actually initiate anything.

It is true that women invite courtship and that courtship very rarely succeeds if it is uninvited (this is where almost all the problems men have come from -failure to spot genuine female interest) but first they have to notice you and decide "I want some of his attention" You may have to go over and start a friendly conversation and see if she is interested.

Its hard to see with limited info. If we could watch you in action at a social event, we would probably know what it was that was stopping them wanting to draw you in. Some guys just don't see themselves as attractive and don't spot small signals. Others stare too much or fail to look with warmth and creep women out. You do need to be completely at home in your setting, acting with all the social norms but also have something about you that that separates you from most other guys. Beautiful women have a lot of interest form attractive men, you need to demonstrate more than good looks and thirst, some genuine connection, some je ne sais quoi.