How can I increase sales in my small business marketing group?

[Dee]

Social media will have a huge impact depending on the type of your target market, age group, type of business/businesses you have. You mentioned that your customers are mainly locals, social media has less value here, especially for age groups 40 and above. Honestly, you have to provide specific information in order to have a customized type of marketing.
Guerilla marketing works effectively, partner with local stores to make your brand and services known, offer sales and coupons for people to try out your service which they may come back for more if they are satisfied, etc.
You said this is a joint venture, ever considered using an online asset management tools (http://www.sysaid.com/free-asset-managem...ftware.htm ) to monitor your inventory, progress, stocks, etc? Having a partner (what more with 20 people) needs an open communication from time to time, and keeping your business facts online will make things easier for everyone to monitor its progress and to avoid miscommunication. This is still part on increasing your sales, having good relationship with your partners, and business.