On the drag in Swampscott (that'd be Humphrey St. from the town green to the fork @ the fish house) is Popo's Hot Dogs. You can get 'em steamed or grilled, kosher or natural casing, with plenty of toppings. They carry Mercury Brewing --cane sugar sweetened-- soda pop.
Steamed, natural casing, with onion or with sauerkrat == hot dog heaven.
Here's a professional
review.