Busy, busy, busy.
Go all the way to the back of the restaurant to order along the left side. I'd recommend trying to grab a menu before getting in line, since it's hard to see the one of the board behind the registers while you're waiting. Plus, you don't want to be the old guy holding up the line while you're making your decision at the register.
After ordering, head to the left to wait for your order number to be called (probably in the form of a rhyme). THEN, you can get a seat. Otherwise, you're the old guy hogging up a table for 6 while people with their food are standing to eat.
The hotdogs are delicious. My boyfriend got the sausage sandwich and loved it. Very tasty place if you can navigate it!