In general, the most common situation for birthdays is to invite friends to a restaurant for a meal and then to sing a song in KTV. The consumption of hotels and KTV is very high, so it costs a lot of money to eat and play casually, and sometimes the money goes out and you still don't enjoy yourself.
At this time, you can buy your own food and cook a big meal for this birthday party, which is both economical and decent. This is the way I used to celebrate my birthday when I was in college. At that time, the monthly living expenses were not much. If I went to a restaurant for a meal for half a month, the living expenses would be gone. So I found a diy around the school, went to the supermarket to buy some dishes, which were very cheap, and cooked a birthday meal myself.
Because I can cook myself, I spent some time cooking a table of dishes for them, which is sincere and decent, and there will be no shortage of food. If you can't cook, you can invite some female friends who are having a good time to come and help. I think they are all happy to come and help, because this kind of birthday is very special and can deepen the feelings between friends.
For friends who have already worked, you can invite all your friends home on weekends and then prepare such a table of dishes, which will be more warm.
There is also a way to have a birthday party by going out to play. You can choose a place with better scenery around you, and generally don't charge tickets. Let's get together to chat, relax, prepare some delicious food, play games while playing, and have an unusual birthday party, which saves money and is also very decent.