Going on a date, she knows the city, but not the activity - is it helpful to let her know to dress casually?

[DrKrieger]

It's the 4th date

[provokeesmokee]

Yeah. Especially if there's a chance her wardrobe would limit her ability to enjoy said activity.

[nolabels]

Always make a date aware of circumstances if out of the norm.

Always.

[Avicenna]

Yes, that’s a good idea

[Nikki1989]

That would probably help.

[TacosRAwesome]

Yes especially if her style is more fancy

[Iron_Man]

Tell her what the dress code is