Of all the benzodiazepines it is particularly pleasant to have a Valium or a Xanax and go to a party. It has an effect very similar to alcohol but doesn't have the physical toxicity. If you have even minor anxiety symptoms you probably won't have a hard time getting an ℞ for Xanax from your primary care doc for 30 pills or so, particularly if you intend to substitute it for alcohol.

Even though those drugs are very safe (in the short term) on their own, watch out that they are highly dangerous to mix with alcohol -- if you do that you could get over-sedated, do crazy things, black out or die.

Other drugs of that family are less good as a social lubricant, particularly the long-acting benzodiazepines such as Klonopin or Clorazepate which could still be sedating you 24 hours later.

Unfortunately if you use BZs regularly for a long period of time you can get an addiction which is particularly hard to kick.

In the realm of speculation it's been imagined that a partial agonist for the benzodiazepine receptor would have a cap on its effects even if you took a large dose and would be very safe for recreational use, kind of like the 'Synthahol' from Star Trek. One advantage is that the effects can be reversed with this stuff

https://pubmed.ncbi.nlm.nih.gov/2244412/

however there is a lot of apprehension about using that drug for BZ overdoses because a person who is badly dependent on BZs could have seizures triggered by Flumazenil.