Thanks for replying. I agree that in general, you need to enjoy the people you work with, and occasional 'outside activities' are fine. I've typically done those with colleagues I've worked with at previous companies. If the company was footing the bill, so much the better. There's a fine line that can get crossed when it starts to feel mandatory, or you're made to feel 'not part of the team' if you choose to opt out (had it happen to me, and seen it happen to others).