Marquee open bar on Monday evening?

[L777]

I recently read about Marquee having an open bar 10-12 on Monday night - is this a one off or a regular event?

The group were on the guest list, but hadn't paid for any package etc

[L777]

The open bar is for guestlisted Ladies every Monday.

Great thanks

I hadn't planned to join the guest list as we will be hotel guests and can get in through that line - however this sounds like there are other advantages to getting on the guest list?

Apologies if silly question!!