I see people saying New Brunswick over East Brunswick, but it also depends how n the crowed you are looking for. East Brunswick is more professional and older crowd mixed in, New Brunswick you will get a professional and younger crowd mixed in.

Fresco (Steak and Seafood) and Rice Factory (Thai) are good restaurants at the edge of East Brunswick.

In New Brunswick you will want to be around George St for example he non-college crowd, Easton Ave is more college crowd focused.

In East Brunswick it will be all paid for things like a bar or a park that closes at sundown. In New Brunswick you can walk around campus like Voorhees mall and Old Queens (next to each other and close to both Easton ave and George st. There is Stress Factory (comedy club) but that needs tickets in advance and has a two item per person requirement. There is also an escape room too.

Hope this helps, good luck on your date, if you give more info on what you are looking for in activities afterwards people will speak up more.