Hi, another recommendation here for Gumbet. It really is ideal for all ages and I'm sure you'll have a great time. Kedi's suggestions of the Royal Asarlik (AI) or Parkim Ayaz (HB) are what I would have suggested. If you fancy B&B and eating out at the great restaurants and bars in the resort, I would recommend the Serhan Hotel. It's a more small and friendly hotel than the other two - but really great value and in a good location.
Just doing a quick comparison of the Royal Asarlik and the Serhan for the same week in July (two rooms in each hotel); there is a difference of just over £1100 (yes £1100) for the two hotels - that's a hell of a difference. But there again maybe you prefer AI or a "posher" hotel.
I'm only suggesting this as one of the complaints that we have found from people staying AI is that the food tends to get very repetitive - and there are so many good places to eat out in Gumbet, that it would be a shame to miss out. Also, if the young ones are looking for night life, there's plenty in Gumbet so they probably wouldn't benefit from the AI drinks in the evening. Don't worry, there's also plenty of night life for the older ones (I can say older ones 'cos I'm the same age LOL).
Gumbet is a great place but it's also easy to get around and explore the rest of the peninsula as well - don't miss that as it's well worth seeing.
If you do decide on Gumbet (or anywhere close by) and want any more information, just give us a shout. We have a house in Gumbet and will be spending the summer there this year from April to October (with just a break in July/August to get away from the mad hot weather).
JAK xx