The most profitable should be the Internet cafe, but the capital is large, the procedures are difficult to do. In fact, you can consider opening the kind of PS2 game room, machine 2000 or so a machine, we here about 3 yuan an hour, many college students to play, in addition, whether to open this or Internet cafes, in addition to the hall have to get a number of small private rooms.
The billiard room should be fine. As long as the students at your school don't come and cause trouble, or you or your buddies can keep things down.
Someone upstairs said to open a restaurant, which is risky not to mention time and absolute hard work, for starters.
Clothing it depends on your school students' consumerism, I personally do not like to go to school when I buy things in small stores near the school, the choice is small, and I do not know whether the price is reasonable or not. Brand discount stores may be able to, but the capital and the choice of merchants is difficult, need experience vision and energy.
Small jewelry may be able to, can be a little with the distribution of some inexpensive and very applicable household goods. But all need experience and energy. The first thing you need to do is to get your hands on some of the most popular products.
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.... The company's business is a very good one, and it's a good one.
Wishing you a good fortune! But the test to pass the section is ah!