Sarona is a fancy food market, Israeli copy of Manhattan'a Chelsea Market. It is open all week long, even on Sabbath. It's a bit fat from the center: take buses 239 from Dizengoff or 9 from Namal to get here.
Everything here is overpriced but if you are into some délicatesse or simply can't stand crowded and messy Carmel market this place can be an option. Fresh fish, cheese, boulangerie, French pastries, good sushi and burgers - you can find here everything. Restaurants worth checking: Meat Bar Burger, Fauchon, Max Brenner, Segev.
By the way, Sarona is a perfect place for a weekend with kids: you've got lots of playgrounds, picnic area, and other attractions to keep your children occupied while you are sipping margarita or doing shopping.