hi..... there are places. at tuesday we train in rodgau in a boulder-gym of a friend. a couple of peoples are there....have some beers,train and talking bullshit. if you are interested i send you my tel.nr with a privat mail. if you dont want to come with us tomorrow...we have a boulder gym also in aschaffenburg....
There are also some climbing spots near Aschaffenburg. I think the best idear ist to talk with an local... Info: the boulder gym is in the baadergasse - you cant miss there ones target because there is a big painting on the wall... You can ask there any boulderer, the most of them are friendly...