Ds1 is at his first h.s. party- one of the girls in his orchestra class invited the whole class to a Super Bowl party. Both dh and I had a drugs/alcohol talk w/ him, and I reminded him that if anything at all made him uncomfortable, to call us and we'd get him, no getting in trouble for it.
This is the first party/get-together he's been to where I haven't known pretty much everyone else invited. I did meet the parents when I dropped him off, and I trust him, but that doesn't help the Mom nerves. . .