Picture from https://www.stromma.com

On Sunday, October 27 , 12:00 – 15:00 there will be a “Brunch cruise” in the Stockholm archipelago. The boat leaves (and comes back to) Strandvägen berth no 16. The cost is 545 SEK and you need to book through this link (make sure that you book the correct date – October 27):
https://www.stromma.com/en-se/stockholm/dining-cruises/brunch-cruises/brunch-with-ss-stockholm/

Short description on the excursion:

Every Saturday and Sunday at 12.00 o’clock S/S Stockholm departs for a three hour brunch cruise in Stockholm archipelago. Sit back and enjoy the beautiful environment surrounding you. The ship is a pearl with large, airy lounges, a grand dining room and an inviting promenade deck. From the table you will have a first class view while the ship cruises through the inner parts of the lovely archipelago. The cruise includes a buffet which is filled with traditional dishes made of Swedish primary produce, cold and warm meats, various salads, breads and other vegetarian alternativs. Make sure to leave some room for cheese, sweets and desserts.