How many of you would follow/friend a carpet store?
How many of you would follow/friend a real estate agent?
How many of you would follow/friend a Pharmacy?
I'll answer it for you. NONE.
But... for a big ticket purchase like real estate, or a home builder, or a landscaper, it's logical that some shoppers would visit the seller's FB page. Shoppers would hope to see a warm and fuzzy place that helps put them at ease. These shoppers are checking your reputation and your stores culture. They will be super stealth (invisible).
Twitter, OTOH, is a different beast. It's content is short lived. You need a large market, the right franchise(s) to make this work.
If you're getting frustrated now, sorry, more of it's coming.