Emerald Cruises is not strictly "adults only," but its environment is very much geared toward adults, and they do have specific age restrictions. For their river cruises, the minimum age is generally 12 years old, though they occasionally allow younger children on specific "family-themed" Christmas market cruises at their discretion. For their luxury yacht cruises (ocean-going), the minimum age is typically 2 years old. Even so, Emerald does not provide "kids' clubs," babysitting, or dedicated children's menus like a mass-market line (such as Disney or Royal Caribbean) would. Because the ships are smaller and focused on gourmet dining, cultural excursions, and quiet relaxation, the atmosphere is naturally dominated by retirees and couples. If you are looking for a purely 18+ experience, you might look at sister-brand Viking, but Emerald remains a very quiet, adult-centric choice for those traveling with older teenagers.