Sure, here are the sentences rewritten using the present simple or present continuous tense:

1. I usually take the bus to work.
→ I am taking the bus to work.

2. They are playing tennis.
→ They play tennis.

3. We go to the gym in the evening.
→ We are going to the gym in the evening.

4. He eats fast food.
→ He is eating fast food.

5. The company usually holds meetings on Wednesdays.
→ The company is holding a meeting on Wednesday.