My two children also suffered from mild and moderate sensorineural hearing loss.  Use of hearing aids complemented by lip-reading and within two metres with the interlocuters help them to follow and engage in a conversation.  However, continuous use of the hearing aid is tiring and they need a break from time to time.

I see this is an old post but I thought I would add if not too late. We used 'The Art of Children's  Conversation cards' game which is currently less than £10 online. There's rules of 'play' in there which we followed and I can't remember now! Essentially ensuring everybody gets a chance to respond to the conversation starter on the card and no-one can interupt.

For free though - We also printed off a few conversation starters on pieces of paper (you can find examples with a quick Google) folded up and put in a large jar which we took turns to pick one using a clothes peg to grab one to inject a little bit more of 'fun'!

Also playing 'Would you Rather' is one where everyone can think of questions to ask as well as answer.

We combined these games as part of our evening meal together so that we had a captive audience and also because that's where most of the arguments over people not listening, not allowing people to speak etc occured.