I travel for work -- I also vape EVERYWHERE! That's why I started in the first place....
I was just at MHT and vaped at the bar - in fact, I vape at every bar in every airport I'm at - so far at West Palm Beach, Atlanta, Philly, Washington (both), New York (both) San Fransisco, LA, San Diego, Chicago (both), Miami, Ft Laud, Boston, Portland Me, Orlando, Dallas, Houston, St. Louis... those are the ones at the top of my head - but not only do I vape at the bar, I vape at the gate (discretely of course)
btw, the bartender at New Orleans vapes - a few others do too, but he was the most friendly.
I also vape at hotel bars too - in the lobby, in the hallways - everywhere... and 9 times out of 10, service industry people have seen it and are ok with it or they are vapers themselves. If they haven't seen it, I educate them.
To top it off - this week I vaped in the hallways of my local courthouse during the breaks for jury duty. I figure if that sheriff deputy with a gun on their hip doesn't tell me to stop vaping, it must be ok