What happens in every episode is as follows:
Takanashi likes something cute, like Taneshima, and goes into trance mode upon seeing it.
Inami resists punching guys, but punches Takanashi anyway.
Taneshima mispronounces Takanashi.
Kyouko sits there waiting for Yachiyo to serve her.
Yachiyo goes gaga over Kyouko, and complains to Satou, who has romantic feelings for Yachyo, and thus gets jealous.
Yachiyo draws her katana and threatens to cut anything that gets in the way of her and Kyouko.
Souma gets dirt on everyone and blackmails them to do his work.
There are other factors that might be added in, like the addition of Takanashi's family, the long lost manager of the restaurant that went out looking for his wife, and, more recently, the addition of a runaway who tries to get her perfect family.
Now, I am a great fan of episodic anime. Just take a look at my favourite list (Aria, Hidamari Sketch, Lucky Star). The major problem is that, without a plot, what needs to be done is to create likable characters and situations that one can really enjoy. I initially liked what they did with Inami, that her man-phobia is affecting the entire restaurant, but there comes a time when a situation gets overused. Yachiyo started as my 2nd favourite character, behind Inami, but, as above, she does nothing different every episode.No one likes to see an overused plot element. It's boring, repetitive, and it makes even 24 minutes weekly a drag to watch.
That said, which other characters are actually likable? Taneshima was supposed to be the lead female, but, obviously, she has been pushed aside by Inami. So, what does Taneshima actually add to the story? She is the most boring lead I have ever seen. Usually with leads, you either like them or hate them. Taneshima does next to nothing each episode, so people can't actually decide if they like her or not. Same goes to the non-main males in the series. For example, the only thing we know about Souma is his blackmailing intent. How interesting does that make a person? We only know ONE thing about him. There is absolutely no character development.
Sound wise, I skip though the opening every week. I mean, seriously, that opening is even more annoying than K-ON!!'s (the 2nd season, btw). Nothing special in terms of voice acting, and art is pretty dull for a 2010 anime.
Granted, Working!! does have its entertaining moments, but unless you really have nothing better to do, or watch it in fast forward like I do, my advice is not to watch it. There are plenty of better episodic comedy/slice of life anime out there. Repetitive attempts at humour really makes this a poor anime.
