"Tag" ban mode.
A regular Summoner's Rift map with a different ban system:
You ban a "Tag" that affects available champions/summoner spells; the following are tag examples:
No Fighter champions 
No ADCs ( huuuuge personal favorite ) 
No ranged auto attacks 
No mobility 
Mages only 
No male champions 
No ninjas 
Mana users only 
No smite allowed 
No flash 
Noxus VS Demacia 
No displacements 
No pushers 
No limit on champion selection ( you can have 3 
in your team )
Certain tags count as mini tags , meaning up to 2 tags can be voted on such as:
No flash , No smite , Mana users only. [ if voted, vote yes/no. If yes, 1 more vote tag ]