I found out after being at my workplace over a year that a large group of workers meet for a regular drink. This appears to happen when I have to stay late at work. My partner at work received regular updates by email, and everyone else I worked with this week knew about it (including supervisors who went and coworkers who joined the company ages after me) but said nothing to me during the week (I regularly talk to them every day). Another colleague earlier in the afternoon said 'are you going tonight to the pub?' and it was the first I heard about it. I told the organiser that I thought it was messy and hurtful that my colleague thought I was going yet nobody said anything. I am polite and professional at work. The organiser and everyone else do shifts with me, and partner up with me. We've never fallen out. I recognise that colleagues are not personal friends, but I do not know why I am not considered. I live in Berkshire so would like to think it's because I travel far into London for work. The organiser apologised and said it was an 'absolute oversight' yet the reality is that I sit alongside him on a weekly basis and find that hard to believe. I tell myself that I am out of this job in the next couple of months, but it sucks.