Nowadays, diet soft drinks are called "zero" instead of "diet". But I am old-fashioned and still call them "diet". Many people do not like diet soft drinks, preferring the loaded sugary versions.
Then, there are some that like cocktails. I like cocktails but instead, due to personal reasons, I drink diet soft drinks and mocktails containing diet soft drinks. These are just as good.

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Do you like Jack & Coke? Do you like Long Island Iced Tea? Drink diet Coke to settle the craving.
Do you like Peach Schnapps or Fuzzy Navels? Drink Diet Sunkist instead.
Do you like Flaming Dr. Peppers? Drink Diet Dr. Pepper instead.

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Do you like whiskey? Mix root beer with Mountain Dew to prepare a virgin whiskey that tastes just like the real thing.
Do you like 7 and 7s? Drink Diet 7 up instead!
If you take my advice, you are not going to end up drunk and make a fool out of yourself. You are not going to wake up with a terrible headache wondering how you got home.
Your chances of getting diabetes won't be as great, along with your liver being destroyed. Can you afford the alcohol habit? Alcoholic beverages are expensive. Save yourself some money and buy soft drinks on sale.
If you want to party, by all means do. This is just my 2 cents.