going out on Saterday (Frankfurt)

Hello.

I am already living in Frankfurt for 1 year now. I am settled down, my Job is going very good and now my mind is staying open for a new relationship.
But where do I find the "good guys?"
People who I like to hang out with are between 30 and 45, they have something reached in life, a good Job, nice career.

Are there Special places, bars, Pubs, where I can meet such People?

Gr.

Laura