A winery may have a wine which they call their "house wine". This wine will often be among the winery's most popular wines. This wine is often blended by the winery. Often, the wine will not have a year vintage, as it will often be blended over several years to obtain as consistent taste as possible.
While every winery won't explicitly label their "house wines" as such, its easy to spot. In a grocery store, the house wine is often the only wine the store will carry. For Oliver winery, their "Soft" wines could be considered their house wines. For Brown County Winery, their "Vista" brand of wines could be considered their house wines. In the Midwest, the house wine is often a Semi-Sweet wine.
House wines can offer some interesting tastes, but often nothing overly complex or exotic. These make good wines to drink every day, but could also be considered for a party too due to their economy and broad appeal.