Blood on the Highway (2008)

Three friends go on a trip, get lost and end up in the small town called Fate, where they've been warned not to go.  When they stop to get gas at a convenience store, the clerk doesn't look well.  He's very pale and has blood on his mouth.

After the clerk bites Sam, they take off, forgetting to pump the gas.  When they run out of gas, they manage to hole up in a house with three other people and discover the town is full of vampires.  Will they survive?

Overall it was an okay movie.  There was a point where I thought it was really promising, but at times it was tedious and a lot of the humor falls flat.  There are a few really funny scenes, as well as some painfully unfunny jokes.  If you're a teenager or like lowbrow humor, you'll probably enjoy it more than I did.