Yes you can surely take Party Twins. Even though you are consuming lesser quantity of alcohol to get a hangover, the by products of Alcohol metabolism are still there in your blood stream and need to be neutalised and excreted.
Yes, though you are not consuming alcohol, you can still use Party Twins as a system detoxifier. You can use it about two to three times in a week. It will improve your Digestive System.
There is nothing to worry. Though the best rrsults are achieved if you drink Shot-1 before the start of the party and Stot-2 after the ending of the party, you can drink both the shots together at the end of the party session. Something is definitely better than nothing.