We were wondering where you were last week!
We are still right on the cusp of needing 2 practice lobbies open on Thursdays. Last week I hosted and we only needed 1 lobby. 2 weeks before that we were full-full and had 2 lobbies.
I suggest we do this; if you have an "unofficial" practice lobby open, shut it down at 6pst/9est (if you want to run Official Practice) which is when Champ opens his. Then everyone join Champs "official" lobby. The sooner we know what our player pool is for the night, the better.
If we fill up to 16 before the start of Race 1 knowing some late-comers will probably join, myself or someone else will start a new lobby. While I like the idea of splitting lobbies at that point into "D1/D2" and "D3/D4", the problem we faced in the past is there might be 13 D1/D2 drivers looking to practice, and only 6 D3/D4 drivers. 1 big lobby and 1 small lobby isnt really fair. So instead of splitting up by divisions, lets just concentrate on making sure both lobbies are split evenly no matter what division you're in. (actually I just realized D4 is no more, lets use tonight as a tool to recruit!)
As the night goes on and as people start retiring, we can consolidate down to 1 lobby. Communication is key, and what has helped in the past is when you're in a party chat with someone in the other lobby; they can keep you updated on the driver count and if its a good time to consolidate down to 1 lobby based on the numbers.
It may seem like a lot of work to make Thursday Practice go right, but we have to consider some nights more people are on than usual. We want to make sure everyone can enjoy a fun practice night like the rest of us and not feel left out.