How do I meet people in Rotterdam?

"Expats in Rotterdam can join a variety of clubs and activities, such as sports clubs, language clubs, and cultural clubs. Expats can also join meetup groups, which are organized around specific interests and activities. Additionally, there are many international organizations in Rotterdam that host events and activities for expats. Other ways that expats can meet people in Rotterdam include attending local festivals and events, joining a local church or religious organization, or simply striking up conversations with people in cafes and bars," mentioned another expat when asked about moving to Rotterdam, The Netherlands.