I don't know much about the mixed stuff. Any of those boozy shakes or floats will probably get you where you want to go, though. Ice cream + milk + tequila + Kahlua for a Mexican Shake or replace the tequila and Kahlua with Irish whiskey and Bailey's for an Irish Shake. Doubt you'd be able to taste any alcohol with all that going on.
You could also try a modified White Russian called a Pink Rabbit: Strawberry milk + vodka + Kahlua.
Other than that, I'll turn things over to the other solo Val who actually knows about the mixed stuff,
@Shin ATproof.
Sweet drinks that mask the taste of alcohol? Most drinks can do that, it just depends on whatever sweet stuff you mix in and in equal parts or more. In terms of recipes, these drinks seem to do the trick:
My favorite is the White Russian and as some have mentioned here. My recipe is: 1.5oz Vodka, 1oz Kahlua, 3oz half & half
Some others...
-Cosmopolitan: 1.5oz Vodka, 0.5oz Triple sec, 0.5oz Lime juice, 3oz Cranberry juice
-Purple Rain: 1oz White Rum, 1oz Peach Schnapps, 1oz Blue Curacao, 1oz Granadine, 3oz Lemonade
-Hawaiian Punch: 0.5oz of each of the following: Raspberry Vodka, Coconut Rum, Melon Liqueur, Amaretto, Triple Sec, Cranberry juice, Pineapple juice and a splash of lemon-lime soda
-Tequila Sunrise: 1.5oz Tequila, 3oz Orange Juice, 1oz Grenadine
-Area 51: 1oz Melon Liqueur, 1oz Coconut Rum, 3oz Pineapple Juice, Splash of half&half
I got lots more floating in my head if there is a particular drink you'd like to mix or drinks for certain occasions, let me know I can probably help with that.
Also...reworking on my fighting game themed drinks. On the list, Skullgirls themed drinks.