Prostawatching. Driving along a known haunt for local prostitutes late at night, watching out for particularly old/young/ugly/etc. prostitutes, and just admiring the general quality and beauty that can be found in the local whore and their pimps. Counting is optional, but not compulsary. Bonus points for finding "ma'ladies."
"I went prostawatching with my mum on the way back from town the other night. We saw 15 prostitutes and 3 ma'ladies along Manchester Street!"
"Wow, what an awesome prostawatching trip that was!"