Numerous things my husband and I do for date nights, like going out to eat at a fast food resteraunt actually going inside, ordering, and sitting down to eat. We also have movie nights cuddling up to eachother. We have candle lit surprise dinners with rose petals and a bubble bath etc. We do lots of things to make eachother feel loved and important.
These are all great ideas. You have to do what works best for your own relationships. Some couples need to go out for date nights, others find their own special time to spend together after the kids have gone to bed.
Typically date nights are a monthly thing to go to dinner and hopefully an event like a concert. With the virus, we have been doing other things for date night such as ordering in take out and playing board games, etc. for fun