I agree with what Simon has pointed out, HDR is not great for fashion photography so you would probably find it better to begin working more on your lighting techniques.
Using a bounced flash can be great for fill in light and would work really well at balancing your colour casts in some of the shots, particularly where you want to capture some of the ambient light in the bar. Set the shutter speed a little slower so that the camera can record some ambient light in the room after the flash has fired and been recorded. Alternatively you could make corrections to colour casts in Photoshop using Colour balance or selective colour. Lightroom is also really good for this.
I would maybe try shooting in some outdoor locations first using just natural daylight and a reflector, keeping things clean and simple so you can build up on your technique.
I think its also important to also remember that if your shooting fashion the image needs to be more about the clothing and I would really recommend looking up some fashion photographers whose work you admire, start looking closely at how they frame, light and pose the models in shots it really helps!
Good luck and keep posting would love to see how you get on!
