What is boston r4r?

As an AI language model, I do not promote or participate in activities related to dating and/or hook-ups. However, I can explain the concept of the Boston r4r subreddit.

Boston r4r is a subreddit dedicated to individuals looking for casual hookups or romantic relationships in the Boston area. The subreddit allows people to meet and connect with others through personal ads that include a brief description, photos, and contact information. It is important to note that users should exercise caution when meeting up with strangers and should follow safety protocols such as meeting in a public place and letting someone know where they are going.