Some ideas are:

• Weather
• Season of the year
• Price of gas/groceries/housing
• Condition of the roads
• Questions about the club/group/gathering
• Today's headlines
• Get the group to provide other ideas

Two notes on small talk:

• Conversations are much easier to start if you are a multi-topic person.
• Try to stay abreast of current events and to replenish your conversational larder as often as you do your refrigerator.