Social group for London concert-goers

1.If a social group was set up, would you prefer:
2.If it was a concert-related meet-up, what times would normally work best for you? (Tick as many as you like)
3.For which venues would you be most likely to attend a pre/post-concert social if it was nearby? (Tick as many as you like)
4.If it was a regular pub meeting (not attached to a concert), which day(s) of the week would generally work best for you? (Tick as many as you like)