My chef and I have a theory. Keep in mind I wouldn't be posting this if it hadn't proven itself time and time again in the state that we live in. When you see a restaurant add pizza (especially pizza delivery) and ice cream to their menu, beware they will fold in 6 months. Yes, there are restaurants that do specifically sell pizza and have right from the beginning, the same goes for ice cream. However, if it's a fine dining restaurant that has added both in the same week along with a wooden ice cream cone outside, that is not a good sign.
This looks like they are trying to make money, and fast! How can a failing restaurant try to increase revenue without putting a very loud (we're desparate) ice cream sign outside their swanky establishment? I think this is where the think outside of the box mentality comes into play. If there are certain items on your menu that sell well, then offer them for purchase in heat up at home pans. I've seen a few sandwich shops do this and they do it well. Chances are if you're failing at that point, then you have staff standing around who can definitely be making these items. Compile these (dinner at home) meals on a sort of take out menu that is given to a customer at the end of their meal with their change. Yes servers out there... don't ask if they want change, JUST DO IT!!! A customer will be much more flattered if you don't bat an eye and just give people their change. Let them figure out the tip, they are the customer after all.
You say, but them I'm scaring people away from coming back. Well look buddy... at this point they're not enough people are coming in anyway. If they have the option of taking their favorites home to heat up on a busy night, good for you and for them. In a tourism focused state, what a great idea for people to order these meals from your restaurant, take them home and heat them up for their condo of 12 friends that they have come to ski with.
This outside of the box mentality will truly help you and prevent you from the screaming ice cream sign (We're desparate!!).