Fantasticon 2018 will take place in a house belonging to The Order of Serapion. It’s a very nice venue, but unfortunately without an elevator.
The address is Haveselskabetsvej 3B. It’s between Vesterbrogade and Frederiksberg Alle.
The route of bus number 26 usually goes directly from Copenhagen Central Station to a stop on Frederiksberg Alle, but due to maintenence work on Vesterbrogade, you must go to Vesterport Station to catch the 26 bus. Get off at Kingosgade. You can also walk from Forum metro station. It’s about 1.4 kilometer. You can take bus 3A part of the way.