Meeting at Parking lot of
Waldspielpark Scheerwald and Grillplatz im Scheerwald,
Sachsenhäuser Landwehrweg 1001 / An der Goetheruh
60598 Frankfurt am Main 

Google Map: https://goo.gl/maps/oraLYF9VzzL7e2Yu8 

Geoportal Frankfurt: https://geoinfo.frankfurt.de/mapbender/application/stadtplan?poi%5Bpoint%5D=480156.92178%2C5548798.58659&poi%5Bscale%5D=5000&poi%5Bsrs%5D=EPSG%3A25832&poi%5Blabel%5D=Meeting%3A+Frankfurt+HHH+%231779

Directions:

From the A661: From Kaiserlei take the exit for Ffm-Sachsenhausen/-Oberrad (towards Frankfurt) and turn left at Gerbermühle on Wehrstraße, 200m after the railroad underpass there is a right left combi.
After another 200m you´re at the traffic light at Buhrainplatz and the tram stop Buchrainstrasse.
Continue „Straight“ & past REWE uphill and onto Buhrainstrasse to the south / uphill down to house number 94 which is at the end oft he housing area. 
Then, after 100m turn right to enter the Sachsenhäuser Landwehrweg. Another 300m and you´ll cum to a lovely little parking lot at the edge oft the wood.
This is our today´s ONON!

From Sachsenhausen: Take Mörfelder Landstrasse and Offenbacher Landstrasse out to Oberrad, at Buchrainplatz take the exit at REWE, then all the way up Buchrainstrasse to the car park in the woods (Waldspielpark). (see "from A661")

Public transport: Straßenbahn Line 15 & 16 to Buchrainplatz (direction Offenbach Stadtgrenze) and Bus line 81 und 82, Exit Burgenlandweg and some walking   
or 10 minute walk past REWE uphill to the Waldspielpark. (see "from A661" too)

Also look for „RehabiliTiere Hundeplatz am Scheerwaldparkplatz"