How can I tell if my Facebook friends have apps?

[in bâ„“ack && white]

Like Farmville, fishville, and Cafeworld?
I need more neighbors but I don't want to send them an invite if they don't even have the app.
Is there a way to tell if they have it or not?

[Nanananana Batman!]

you cant unless they shared

[RV]

for farmville, if you click the view neighbors tab, you should see a list of your friends that are playing the application. From there you will be able to invite those that are not your neighbor.