Guys my boyfriend has very sloping shoulders which he doesn't like. He is quite skinny and not muscle at the moment. We will be joining the Gym soon and was wondering if there are any exercises he must avoid (i.e. which would emphasise sloping shoulders) and any exercises he should do a lot of (i.e. to minimize their appearance).
Any other tips on what he can do to get rid of them?

Many thanks

Lots of shoulder exercises, military press, dumbbell shoulder press, front raise, side raise, rear fly.

Also things like dips and pull-ups will work the shoulders and upper back too.