There are several reputable English speaking courses designed for adults that cater to various learning goals. Some of the best options include:

1. Cambridge English: Cambridge offers a range of English courses specifically designed for adult learners. These courses focus on practical language skills and are widely recognized internationally.

2. Berlitz: Berlitz is known for its immersive teaching methodology, focusing on practical spoken language skills. They cater to adults looking to improve their English proficiency for professional or personal reasons.

3. EF English Live: EF Education First offers online English courses tailored to adult learners. These courses are flexible and can be personalized to meet individual learning goals.

4. British Council: The British Council provides a variety of English courses for adults, including general English, business English, and exam preparation courses. They have a strong reputation for quality language education.

5. Rosetta Stone: Rosetta Stone is a popular language learning software that offers English courses for adults. Their interactive approach focuses on developing speaking, listening, reading, and writing skills.

When choosing an English speaking course for adults, consider factors such as your current English proficiency level, learning style, specific goals (e.g., business communication, exam preparation), budget, and schedule flexibility. It’s recommended to research each course provider thoroughly to ensure they align with your individual learning needs.