You have to go to the ones in Causeway Bay, the one across from Lee Theatre is one, the one that is between Sogo and JP Theatre is another. It is best to go on weekends or evenings. I don't know about the doughnuts, but these places do open later than the ones in Wanchai.
There is another one in Causeway Bay Plaza 1, but it is small and does not have many gals.
Another trendy coffee shop that the girls like are those Anna B coffee shops. The one in IFC has the classy gals, the one in World Trade Centre has some nice normal girls and ladies.
I think the trendy, young crowd prefer Starbucks over Pacific Coffee and Habitu.
In those other coffee shops with better coffee, the only place you will see nice gals are the ones on your laptop screen as you surf the net on the shops' free wifi.