Preheat the oven to 375°F.
In a large bowl, mix together the cream cheese, mayonnaise, sour cream, lemon juice, Worcestershire sauce, Old Bay, Dijon, garlic, scallions, salt and hot sauce until smooth.
Set aside ½ cup total of the mixed cheeses for topping, then stir the remaining cheddar and Monterey Jack cheese into the mixture.
Make sure the crabmeat has been drained of all its liquid, then gently fold it into the mixture, being careful not to break up the lumps too much.
Transfer the mixture to a 2 quart baking dish or cast iron skillet. Sprinkle the reserved ½ cup of cheese evenly over the top.
Bake for 20-25 minutes until hot and bubbling around the edges. Garnish with more sliced scallions if desired.
Serve warm with crostini, crackers, chips or celery and carrot sticks.
