i’d say your best bet is the coach park, its out the back of t.o.t.s, if its still called that?
spent many a night there in my “yoof”
have a walk down onto the seafront, and have a mooch about, its quite entertaining at 2am onwards, what with the local “ard” men having a barney, over there white stilletoe’d darlings, whilst kevin and perry large it up and down the golden mile in there saxo’s and the like 
you’ll be spoilt for choice on fish and chip joints, and if you move either way off the main strip, there are a couple of decent boozers for a beer and a sunday lunch. if you don’t mind a walk? if the weather is ok sunday, walk along the seafront back towards london, pass adventure island, and the casino, and you’ll come to a set of pavement cafes on the right past rossis, locally known as the arches. choice of 10 or so, decent grub, and a nice walk if you like that kind of thing.
coach park, to the arches, approx a mile, or just over. 20 minute brisk walk.