What social strategies do you use to limit your "wildcard" coffees and lunches without offending people or creating awkward situations? I just quit my day job

What social strategies do you use to limit your "wildcard" coffees and lunches without offending people or creating awkward situations? I just quit my day job recently to focus on my startup and have been getting tons of introductions to all sorts of people. While it's been really fun and beneficial, it also is pretty distracting from actually building something.