Are you chartering a Lagoon or a Fountaine-Pajot Lavezzi? They are two different boats. Are there four heads (i.e., one per cabin) or just two? If four, it is extremely unlikely that you will have a separate stall shower. If two, it is very possible that there is a separate stall shower in each head. However, you would really need to ask the charter company to be sure. Even if you know the type of boat and the exact model, there can be different cabin layouts. Regardless of which boat or model, each cabin will definitely have a porthole (or two) and an opening hatch.