in Kungsträdgården park has opened for the season... even if the temperatures haven't gone under the freezing point in Stockholm yet. It is open 7 days a week with generous opening hours (weekdays from 9am to 9pm, weekends from 10am to 9pm). If you have your own skates then skating is free. If you don't have your own skates, don't worry... they have skates for rent at the rink. Rental prices are also generous with adults paying 60 SEK per hour and children/youth under 20 only needing to pay 30 SEK per hour.
Christmas market (open daily from November 28th to December 22nd) or perhaps a visit to the NK department store or downtown shopping district. The rink is lit up in the winter darkness and they play music, so it is fun just to stop by and watch the skaters while sipping some glögg.To get there from the Rival Hotel, it is just a 30 minute walk through the Old Town (Gamla Stan), 3-4 stops on the subway or a 5 minute taxi ride.