With under 10, you should be able to establish a wonderful bond.
In OLK, we only conduct business during our monthly meeting. The meeting usually lasts two days (Sunday and Monday). The rest of the time we are just writing back and forth about our lives, just enjoying the friendships that we've built.
Our community service mostly happens through donating to meaningful causes. Our annual dues go into the general treasury, and then each year, the Service Chair proposes three or four charities. We vote on our favorite, and we give a check to them. We also give to Beta Sigma Phi's Disaster Relief Fund every year.
Good luck in helping your chapter grow and thrive!