I suppose you want the singular after "neither", i.e. "is pretty"
This is certainly acceptable in speech. Now, you could make the argument that in proper, written English one should use the singular. However, I looked this up and it seems like the jury's not completely in consensus on that one either...
See Usage Note: http://dictionary.reference.com/browse/neither
So, at the worst, we could put a "spoken" or an "informal" tag on this, but I'm not really sure that that's necessary.
A quick count of all the “neither of” sentences I could find on Tatoeba comes out as 9 with the verb in the singular and 4 with the verb in the plural, with [#305111] sing. and [#400181] plur. owned by the same person (CK) on identical topics, and with all plural instances marked as OK.
So that settles “the argument”. Have a good weekend, Gene, and thanks for getting back.
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