Opportunities for public speaking?

For years now, I’ve enjoyed every opportunity to give a public speech. This past weekend, I was best man at a wedding and stood in the middle of the room in order to give my toast. I was really nervous at first, but as the crowd reacted to what I said, I found myself milking it and having a lot of fun. So many people positively commented on the speech afterwards. What venues, vocations or opportunities are out there to hone my trade? I’d love to do more of this, but I don’t know where to look.