It has to be done fairly with Mr Y as the puller out of teams otherwise if you can choose whomever you fancy it will not be a sweepstake. Nellie and Itchy can do what happened in the last Strictly and negotiate for a swap with the person who got the team they wanted can't they?
Each team is numbered and anyone who wants to enter will pm a number to whom ever is allocating (usually me but doesn't have to be) and they then are allocated the corresponding team (who has what is not revealed until all teams have been taken)
If the number they choose has already gone then the nearest available number is allocated to them.
When all teams are allocated then a list is posted to show who has which team then its just a process of elimination as teams get knocked out of the tournament and last man(or woman) standing wins the prize. Usually an e voucher at a retailer of their choice
All is fair and above board as I have a massive sense of fair play so there is no number fixing, what you draw is what you get
We run a thread and people are free to chat or not as they choose (obviously better if people join in) but no football interest is necessary to enter