The steps for Meituan to order food in-store are as follows:
1. Open the "Meituan" app on your mobile phone and click on the "Food" option at the top.
2. Find the "Booking Preferences" option at the top of the page and click it.
3. Select the number of people who need to dine, the time period and whether you need a private room.
4. Enter the restaurant selection page, browse to find the restaurant you want to go to, and click "Reserve a Seat".
5. Reconfirm the number of people dining, dining time, and private room status.
6. After selecting, click "Reserve Now" in the lower right corner, and then you can go to the restaurant to eat at the appointed time.