Perhaps a brown ale?
This is what I generally brew for the masses. I want to distinguish my homebrew from the usual BMC fare. A low-gravity brown can be quite flavorful without being heavy. And it's not as intimidating as something like a stout or porter for the uninitiated.
At my son's birthday party last summer I served my table-strength saison, a hoppy pale lager, and my oatmeal brown ale. The brown was gone in no time, the lager had a few fans, while my best friend's wife and I had the saison all to ourselves.