I feel drawn to comment,...so please forgive me in what I'm going to say which is without any malice and with absolutely no desire to upset you.......
There's nothing 'wrong' with the pix,...they are sharp and well exposed. The camera obviously works and you can hold it still and level while the shutter is open.
Personally I have severe doubts about the x100 'experiment' and can see a lot of very undersirable by-products of it's emergence,...but it would perhaps be churlish of me to go in that direction........Suffice to say that the x100 is basically an inferior Leica with one lens which apes a typical Leica street rig as used by the main protagonists of the great era of Leica photography such as 'Picture Post' photogs, Thurston Hopkins and Bert Hardy and the Frenchman Henri Cartier Bresson,..also the American 'Life' cameraman Alfred Eisentatdt etc etc.
All of these men had a great 'eye' for a picture and used the Leica with one lens as an extra eye which could instantly record the images that they saw and recognises as being interestig to other people when reproduced on the pages of their magazines
To get back to your pix,... what, if anything is interesting in them? Do they highlight something about the cafe or the people in it? Is the 'still-life' of the coffee significant in some way that the viewer should recognise? Are these pix novel or different to those of other x100 users? Do these pix 'grab' ones attention and make one look at them?........
Cartier Bresson said that there is nothing worse than " a sharp picture of a blurred subject"....
So, you could start by 'googling' for the work of the above photographers to get some idea of whats possible with a 'simple' camera rig,... Then, sit down and think what YOU find interesting a work out how to show that to the viewer.
Next, read up on composition and memorise the simple rules that will lift your pix into 'photographs' namely the 'rule of thirds' etc. Then go back to the 'greats' and see how they instinctively did this in an instant.
Lastly, in your pix the only thing that one wants to know more about is your niece who can just about be seen looking concerned at you from the counter,...how about some workplace portraits of her while you get your 'eye' in tune?