Welcome to Tallinn! I'm going to EuRuKo and I know about 2-3 people who will be in there as well.
How long do you stay in Estonia?
I can come, say tomorrow, to Old Town or around there. For example, we can go to the Lounge 24 bar (https://www.radissonblu.com/en/skyhotel-tallinn/restaurants
) of top of Radisson hotel. There is nice view over Tallinn. Does it suits your to meet 18:00?
If you or other people in the list has other ideas/suggestions, let us know.