Most Chambers offer quite a lot of opportunities to meet other members. There are usually after hours mixers, leads groups, business development programs, breakfasts, and several other networking and advertising opportunities. But as a member it is up to you to participate. The more you participate, the more you'll get out of it.
The Chamber will not only allow promotion through social networking, but it will give you a sense of the community and how people respond in your community. It is hard to know exactly who your customers are if you don't get out there and meet them.
I was lucky, Digital Ink is located in the beautiful Melbourne, FL. Our Chamber here http://www.melbourneregionalchamber.com has a large membership and ample opportunities for business owners and leaders to share information.
Chamber dues are relatively inexpensive. They have different levels, based on the size of your business. Which is great, for small business owners to really take advantage of what The Chamber has to offer.