The easiest form of transportation from the Forum venue to the Lappeenranta city centre (and vice versa) is a bus or a taxi.
There is a bus stop right in front of the Forum venue. Buses 1, 3 and 5 run between Lappeenranta University of Technology and the Lappeenranta city centre. Information about bus schedules and bus lines can be found here
You can also ask about public transportation at the Forum information desk.
If you are arriving at Lappeenranta from Russia by train, it is useful to know the timetables of the shuttle bus from Vainikkala to the Lappeenranta city centre. They can be found here
In the city centre, it is easiest to move about by foot. The distances are not long, and by walking you get the best picture of our beautiful city. However, if you wish to call a taxi, the number of the taxi center is +358 200 60 400.