There are numerous small businesses that can be profitable, depending on various factors such as location, target market, competition, and personal interests. Here are a few examples of small businesses that have the potential to make money:

1. E-commerce: With the growth of online shopping, starting an e-commerce store can be a lucrative business. Niche products or unique items can attract a specific audience. For instance, selling handmade crafts or personalized gifts on platforms like Etsy can be profitable.

2. Food truck: Food trucks have gained popularity in recent years due to their mobility and lower startup costs compared to traditional restaurants. Offering specialty cuisine or unique food items can help attract customers. For example, "The Halal Guys" food truck started in New York City and has expanded to multiple locations worldwide.

3. Digital marketing agency: With the increasing importance of online presence, businesses often seek help from digital marketing agencies to improve their online visibility. Offering services like social media marketing, search engine optimization, and content creation can be profitable. An example is "Neil Patel Digital," founded by Neil Patel, a renowned digital marketer.

4. Personal training: With the growing focus on fitness and health, starting a personal training business can be a profitable venture. Offering specialized training programs, such as weight loss, strength training, or sports-specific training, can attract clients. "Fitness on the Go" is an example of a successful personal training business operating in multiple cities.

5. Tutoring: Providing tutoring services in specific subjects or test preparation can be a profitable small business. Specializing in high-demand subjects like math, science, or languages can attract a larger clientele. Online platforms like Tutor.com or Wyzant can help connect tutors with students.

6. Subscription box services: Subscription boxes have gained popularity in recent years, offering curated products or experiences delivered to customers' doorsteps regularly. Examples include "Birchbox" (beauty products), "HelloFresh" (meal kits), or "BarkBox" (dog-related products).

When considering any business idea, it is essential to conduct thorough market research, assess competition, and identify a target audience to increase the chances of success. Additionally, creating a detailed business plan and seeking professional advice can contribute to the profitability of the venture.