Listening to talented street musicians 4

I've heard some brilliant musicians in the metro stations in NYC or Rome. Here in San Francisco there are surprisingly few legitimate street musicians. Most of them have more schtick than talent.

For example:
There are 2 guys who do some mediocre dance moves to a boombox outside our office on occasion. Their music selection is intentionally awful.

There's a rather aggressive guy with a guitar in the mission late at night on weekend who generally just yells at people rather than playing anything. This works surprisingly well on hipsters...possibly more effective than music. I give him credit for knowing his audience.

While cycling through the more tourist-ridden areas of town i've encountered a guy with a full upright piano attached to a bike (I'll find photos of this and post them).