Blue's Beach Hut
From the Super Mario Wiki
Blue's Beach Hut is the home of Blue in Donkey Kong Country 3: Dixie Kong's Double Trouble! It is located inside the entrance to Cotton-Top Cove.
When Dixie Kong and Kiddy Kong visit Blue's Beach Hut, they'll discover that Blue is sad because the rest of the Brothers Bear failed to bring him a present for his birthday. However, if the Kongs manage to obtain Blizzard's Present from Blizzard's Basecamp, they can deliver it for him. The present will turn out to be a Bowling Ball, which Blue has no use for, and will let the Kongs keep it.
In the Game Boy Advance re-release, the beach hut receives party decorations, including balloons, cards, food, and presents. The hut also contains a fireplace, though the calendar stating his birthday was removed.