This is my list of companies that will ban your business account if they know you're involved with Bitcoin. (NOT ICO's... but Bitcoin specifically)
ChimpMail.com
ConstantContact.com
SendInBlue.com
Twitter.com (they "will" ban small Bitcoin businesses)
Please feel free to chime in if you've had any businesses accounts closed due to Bitcoin.
Not sure if still the case, but certain banks in the UK have been restricting customers from making transactions buying BTC. I'm certain this will lift over time, especially as I know other banks are starting to really invest in Blockchain