Surf the net and see if there are any social or community bulletin boards or listservs that pertain to your area. Post a message about your group. Generally, you will want to choose books to discuss at the first two or three meetings. After that, you may want to leave book choices up to the group as a whole. If you are publishing information about your group, you'll want to have your reading scheduled for the next two or three meetings at all times.
Different clubs choose books in different ways.
Some allow each member to take a turn choosing a book. The leader's role is not to monopolize the conversation, but to keep the discussion rolling by bringing up relevant points and questions. If someone suggests a new meeting location, be willing to give it a try. But if you've published a schedule online or on a community bulletin board that says you'll be meeting at your current location for the next three months, don't make a change until after that date. Find a happy medium between keeping current members happy and keeping the door open for new participants.