In reality, the activities that bankers seem to spend the most time on, is treating their "preferred clients" with free gambling trips to Las Vegas, skiing in Chamonix, flying wives and girlfriends in helicopters, doing blow in industrial amounts, and, of course, cavorting with strippers and hookers. All paid for by some unwitting clients of course. It is this environment of utter and perfectly permitted, if not encouraged, debauchery that allowed scandals such as the Libor fixing "conspiracy" (first theory, then fact of course), to flourish, and which makes being a banker still the most desired job in the world (contrary to beliefs that it was all about the passion of crunching goalseeked DCFs at 2 am in the morning).
A quick summary of what really goes on behind the glass doors:
http://www.zerohedge.com/news/2013-05-02/free-vegas-trips-cocaine-and-hookers-peek-real-banker-life