Choosing Events
One small church (average worship attendance under 90) I worked with did 4 events over the course of a weekend: a golf event for men, a ladies tea, a concert for youth and a family carnival. Another church put all their effort into a sweethearts dinner on a Saturday night near Valentine's Day. Yet another church did 3 seminars on parenting, finances and emotional health -- each with a gospel presentation woven into the seminar.
Most importantly, your church needs to create an event(s) that they could be passionate about and that there would be people in the congregation who could enthusiastically champion the event. These events thrive when there are people in the church who get excited about them and are willing to invite. They underwhelm when the church is marginally interested. Choose events that engage your church's heart and passion.
Smaller churches need to focus there energies. That might mean to focus doing 1 larger event quarterly or it might mean doing 2-5 smaller events over the course of a weekend. More events is not necessarily better or more effective. Consider: What will it take for your church to do whatever event you choose with dedication and high quality? Plan accordingly.
Look at the previously posted Potential Affinity Groups for some ideas or create your own. Pray over it and ask God to bring ideas to mind. Whatever you do, do it with excellence and heartfelt passion, aiming to pour out God's blessings on those who attend.