There's a thread on Chat Constantly (Everything you need to know about going to ABBA Voyage )
When DD and I went in Nov we wore long sleeved tops, jeans,comfy shoes , gilets and cross body bags under the gilets so hands free .
We're going in Dec this year (the later time) so chance to dress it up and leave the coats in the cloakroom.
There were people in sequin trousers , those brilliant white butterfly wing tops , wigs (but you aren't allowed Afro wigs) . Some in nice evening dresses , some in jeans like us .
Dressing up looks like great fun especially in a group . And when you're on the train you look at your fellow passengers and think ahh I know where you're going 
They played some songs near the start that I'd never heard before but you can check on the ABBA Voyage page for the playlist .
I'm tempted to buy a gold skull cap to go with my top .....
Nice Bank Holiday relaxing day , just had to wade through a load of dishes as the dishwasher has thrown a wobbly .
I've got a Charity Shop bag tomorrow so going to sort that out ,
We're into the One Hundred and Teens now 