No smoking signs are gaining more prominence at hotels across North America.

Choice Hotels recently announced that 1,800 of its Comfort Inns and Comfort Suites in the USA and Canada will be 100% smoke-free starting this year, making it one of the largest brands to say no to smoking.

Wyndham Hotel Group’s full-service and lifestyle brands — including Dolce Hotels and Resorts, Wyndham Grand, Wyndham Hotels and Resorts, Wyndham Garden and TRYP by Wyndham — are smoke-free in North America.

Two of Hilton’s newest brands — Canopy and Tru — will have a brand-wide non-smoking policy. The first Canopy hotel opened in Iceland last year, and the first Tru has yet to open.

Except for a handful of properties, Carlson Rezidor Group’s hotels in the Americas are smoke-free.

These…