I would say IR adderall (low milligram, like 5 or 10 mgs) would be good as you will be actively engaged in conversation with others, and it wouldn't last too long. Try not to take it too late at night as it would keep you up. Make sure it is the instant release so you aren't locked into a 10 hour experience. There are downsides though, you would develop a tolerance, or get addicted, you would basically be relying on meth to socialize. I would just learn to be relatively sober and be okay with that, maybe have a few beers like everyone else.
I like doing LSD (very low dose) in social situations but I wouldn't recommend it if you aren't experienced.
