The burgers aren't the only cheesy things here.
Growing up in the area, I remember the 50-50 as a classic neighborhood bar. Good for a drink after work and a fun joint later in the night. Unfortunately, the place has taken a turn for kitch in recent years. A Tarantino theme is shaky in concept, and the execution here is so poor it evokes constant douche-chills until the patron internalizes and accepts the dull stupidity of the decor. Putting up a few QT movie posters and filling in the rest with sock-hop dance decorations doesn't create and atmosphere; it just makes the customer feel puerile for even being there.
On the beer: I tend to judge a bar by how well their draft beer is maintained, and 50's fails miserably. Recently, a pint of Shiner Black I had had the skunky taste of dirty lines. I pointed this out to the bartender who dismissively told me it's the distributor's job to clean the lines. And, he didn't even offer me a different pint.
On the food: The burgers are actually very decent eating once you get past their Pulp Fiction-(un)inspired names.
On the service: The waitresses are generally in the too-cute-to-hate category, so their defects in service often go unrebuked. They're not bad so much as slow and casually unprofessional, but that's pretty much what you expect at a bar of this caliber. The bartenders, at least the ones I've encountered, are aloof dullards who seem reluctant to pour a pint for fear that the act may confirm the lowly nature of their station in life.
On the music: The quality of the performers is variable, but the real problem is that 50's is just too small a venue for how loud most of the acts are. Bear in mind, however, that I'm the type of bar-goer who likes to converse with my drinking companions without doing that aggravating high-volume yell-talk thing. If you value the art of D-list musicians over communication with others, this concern won't apply to you.
It's really a shame to see what's become of a once great neighborhood bar. Cheers!