I just put a roll according to number.
100 first, then 20's, 10's, 5's and 1's. That way, if I'm going to deduce from the pile I can get what I want easy without being a big show off.
Then I stuff it in my pocket deep so that if someone puts their hand in my pocket (trying to feel my dick or something) I'll be able to snatch their hand with some kung fu.