How do I improve my conversational skills?

I’m a terrible conversationalist. I can’t make a joke, or tell a good story. I am pretty boring to talk to most of the time.

I’m not terrible with strangers one on one. In fact that usually turns out rather well. I also manage quite nicely if not lovely with friends except for when we’ve hung out to long or too often.

Getting to know people is easy if I’m interested in their personality.

Groups of people, people I run into casually, acquaintances meeting people in a mixer setting… Etc…. I need help with. Does any one have an idea how to improve in these areas?