The people here are great, in my experience. Sensible, polite with the right balance of willingness to get naked and naughty.
Get yourself out to a social and you'll see exactly what I mean.
The same friendly & fun attitude carries on from the forum to the socials!
As for etiquette, act as if you would when out with 2 good friends and 1 new person you're trying to impress/flirt with - and you'll be fine.