Cafe Ollin is the latest East Harlem establishment to offer a deal on Groupon. It's great to see uptown joints getting in on this great marketing tool. The coupons are sure to bring new customers up to the area with these fantastic deals. In the last few weeks I've purchased Groupons from East Harlem Cafe and Lloyds Carrot Cake Cafe. It's entirely possible that I'll be paying for meals solely with Groupons this weekend.