Eat: I suggest going to a small restaurant. I don't think hot pot restaurant is good. Few are clean. Jintan food street is too dark, and there are many small restaurants in the west of the city. You can find it as soon as you look for it.
Entertainment: At this time, before summer comes, you can go out to play. Recently, an amusement park called Nanzhouli Amusement Park opened near Gulong in Jintan. There are roller coasters, go-karts and ferris wheels, which are not expensive. 100 yuan for an afternoon, worth a try. I went to play all afternoon on May 1. If there are many people who are worried about money, you can go there to see the scenery or go fishing. The scenery there is good, and you can go to Gulong Mountain at worst, hehe. ...
As for KTV, I think the newly opened "Good Time KTV" is good, just opposite Xiaojinhai, and the signboard is quite big, so I should be able to see it. Charge by the hour. It's cheaper to get a membership card.
Class reunion, these places are all over. It's almost evening. If you spend the night, you can find a hotel to play cards or something. It's simple. Jintan hotel is not expensive, but there are still many. Let the landlord handle it himself.