Take a Big Gulp, Park Slope: The largest chain store in the world is moving in. A 7-Eleven is coming to 5th Avenue between 13th and 14th streets, taking a storefront that used to house a 99-cent store. The 7-Eleven opening sorta seems emblematic of the divide between the types of retail on 5th Avenue north and south of 9th Street. South of 9th you still see a lot of distinctly un-yuppie mom-and-pops and big chains like Domino’s; north of 9th, a new boutique pitches its tent practically every week. It’ll definitely be interesting to see whether fancier retail starts heading farther south on 5th over the next few years or if the area below 9th is going to stay scrappy for a while. In the meantime, brain freeze! GMAP P*Shark DOB