People goto Jumeira for their weekends you are in jumeira and asking us. lols . Please dont be offended, just go to the nearest beach and dont do anything only watch and observe people, trust me best thing to do.
Jumeirah Beach Resident or just across one of the bridges over the marina to Marina Walk. Both areas have dozens of restaurants/coffee shops/cafes. There are all the usual international fast food places like McDonalds, KFC, pizzas etc. There's also a fast food court at the top of Dubai Marina Mall.