Paste files to multiple destinations
1 - Open Automator and create a new Service:




2 - Set the Service to receive Files and Folder in Finder:




3 - Drag an "Ask for Finder Items" action:




4 - Drag a "Run AppleScript" action:




5 - Paste this code:



on run {input}
    set numItems to count input
    set theFile to item (numItems) of input as text
    set numItems to numItems - 1
    repeat while numItems is not 0
        tell application "Finder"
            duplicate file theFile to folder (item (numItems) of input as text) with replacing
            set numItems to numItems - 1
            delay 0.1
        end tell
    end repeat
    display dialog "File copied to all folders" buttons {"Thanks"} giving up after 5
end run





6 - Save your workflow and name it as you want:





7 - USAGE:
Select as many folders as you want, right click, services, find your workflow:



Select the file you want to copy (beware the window can be hidden behind the main one):



Click "Choose" and wait for the copy.



PS: the file will replace existing ones with the same name.