Nice to see you pushing yourself outside your comfort zone.
#1 Very clever and the more you look the more you see, I think it works well
#2 Really like this shot works well and the treatement is great
#3 This one I'm undecided about, I like it as it seems very 'vintage' but its also a little (hmmm 1 dimensional) if that make sense ?
#4 Great spotting with this one, love the concept and you've captured it well
(So when's your next Urban Jam Session ?)