I get the idea behind what you are doing, however I cannot support the way you are going about it. Someone clearly has gone through the trouble of organizing your event, I mean those matching shirts didn't make themselves. You created a list of people to participate, sent out a Facebook invite and all sorts of mass texts, chose a date and a starting time, too. So why, oh why, can you not decide beforehand which bars you are going to patronize? And once you have chosen your locations, why not just give those places a heads up that you will be a big group of people arriving all at once? Would you show up to a restaurant with 30 people unannounced?(And if you would, this serves two purposes). That way the bar can plan to staff for you. Even if you are only going in for one or two drinks, you are bombarding the servers and annoying the other customers. And for fucks sake, before you head out on your quirky little adventure, stop by the ATM and get some money so that you can PAY IN CASH! That way you won't be rolling your eyes at the staff as they are trying to close out multiple cards all at once, as well as helping out a small business avoid exorbitant card processing fees, especially on such small transactions. I am neither a bartender (although I have been) nor a business owner, but as a customer who loves my bartenders and my bar, please take heed so that in the future you may suck a little less.