Workshop redesign

I'm hoping to start a Diploma in Floristry in September, and my parents have said I can have the cabin at the bottom of the garden to use as a workshop. It was previously used by my brothers as a gym/game room so it's very masculine at the moment, but I'm sure it won't be long until it's all girly :)

The main problem is that I'm not allowed to paint anything, it has carpet and has been a bit of a dumping ground for odd furniture that doesn't fit in the house. The bench press is going to be the most difficult bit to work around but I'm hoping to get some sort of screen so I can tuck it away in a corner and hide it out of sight.