@jasod Rootbeer
Floats, but instead of ice cream use "heavy cream" in the keto friends. It tastes like a float, but doesn't have carbs.
I also have a Keto "lemon drop" if your friend doesn't mind artificial sweetener.
1 or 2 pack Splenda or Nutra Sweet
2 oz Lemon or Orange Vodka
3 dashes orange bitters
1 oz lemon Juice
Careful though, on keto you get drunk faster.