I've seen a following approach working really well:
Go to the non-IT related training/workshop aimed at managers from SMEs (ideal topics would be related to marketing, sales, creativity, design thinking etc. - areas were people seek inspiration, new solutions etc.) It should be a genuine, practical training (not some kind of psuedo-seminar which in fact is 8 hours long sales pitch by the organizer) which will give you opportunity to do something with other participants, socialize and learn about them.
During the exercises, discussions and breaks use the advice already provided here: show interest in other people and their challenges, ask a lot of questions, provide them with some feedback/inspiration/ideas/knowledge (but without selling your services directly). You'll learn about them and their market and present yourself as a competent, helpful person. As a bonus you can also learn something from the workshop itself. I've seen many relationships build this way on my trainings. Several of them even transformed into new businesses.
Go to the non-IT related training/workshop aimed at managers from SMEs (ideal topics would be related to marketing, sales, creativity, design thinking etc. - areas were people seek inspiration, new solutions etc.) It should be a genuine, practical training (not some kind of psuedo-seminar which in fact is 8 hours long sales pitch by the organizer) which will give you opportunity to do something with other participants, socialize and learn about them.
During the exercises, discussions and breaks use the advice already provided here: show interest in other people and their challenges, ask a lot of questions, provide them with some feedback/inspiration/ideas/knowledge (but without selling your services directly). You'll learn about them and their market and present yourself as a competent, helpful person. As a bonus you can also learn something from the workshop itself. I've seen many relationships build this way on my trainings. Several of them even transformed into new businesses.