If you can say no to alcohol, then that is best. Alcohol beverages are not exactly good for you, although a glass of red wine does have heart benefits, most are just fattening.
Beer is especially fattening. Cocktails are fattening depending on what they are made of. For instance, whiskey and Coke. The whiskey may not be fattening, but the Coke definitely is. Plus, after a few drinks most people get the munchies and when you’re feeling a little inebriated and hungry
you won’t be able to make rational decisions regarding your diet and it’s usually late at night, just before you pass out from a night of drinking, that you overeat. The overall combination is just not a good one.