I meet with an informal group of friendly local designers every Wednesday evening at 7pm at the Lansdowne pub in Cardiff. Anyone is welcome to join us! We are a mixture of professional designers, amateur designers, first-time designers, and even people who are just vaguely interested in how games work!
Feel free to send me an email if you're worried about turning up alone - and I'll look out for you!
Our group is part of the Playtest UK network. There are similar groups in cities around the UK. Take a look at the website: