Sweet Tart Aisle Solutions
Thanks to Platypus for the majority of these answers!

After swinging by the ticket booth, you can come here to check out the hottest bands in all Neopia. = Concert Hall

Are Mika and Carassa ever going to move out? Oh well, might as well take advantage of the bargains while you can... = Garage Sale

Arr! Keeping' yer little wooden boats afloat in these waters will be requirin' that ye have quick wits an' a solid strategy. Ahoy, mates! = Armada

Collect all the passwords by working your way through the ranks and defeating the mysterious Jetsam by pulling him into the river. = Tug-O-War

Dr. Sloth keeps the secret ingredients for his transmogrification potions here. Avoid the Korbats and Spyders to foil his evil plot! = Korbat's Lab

Okay, so they might slobber all over the place and keep you up all night, but everyone knows that Grundos need love, too. You can pick one up here = Grundo Adoption Center
Please the mighty Pango Pango by paying Jhuidah a visit. However, you shouldn't come empty handed... = Cooking Pot

Roll up, roll up and take a spin. For the measly cost of fifty NPs, you too can be under whelmed by what you might win. = Wheel of Mediocrity

Use your Wocky Tank to destroy the invaders and defend Protection Zone 6B. = Swarm

When you visit here, a spooky old eyrie will greet you with tales of spin-chilling horror that are sure to leave you sleeping with the lights on. = Scary Cave