"offline venues" is a correct and usable phrase in written English.
It refers to physical locations or places where events, activities, or businesses take place, as opposed to online or virtual spaces. Example: "Our company's marketing strategy involves promoting our brand in both online and offline venues. We will have a presence on social media, but we will also participate in trade shows and host events at offline venues such as hotels and convention centers."
The biggest advance that Groupon has made is that it makes an online recommendation of an offline venue (a place).
The databases were searched using the following key words: "men who have sex with men", "Internet", "web", "online", "offline", "venue", "MSM", "gay", "homosexuality", "risky behavior", "sexual behavior" or "anal intercourse".
Most of the previous studies were conducted using offline-recruited (venue-based) sampling methods among MSM.
Many studies showed that MSM seeking male sexual partners (sampled offline or from fixed venues, such as gay bars, bathrooms, or clubs) engage in several risky sexual behaviors, such as UAI, having multiple sex partners and anal sex [ 8- 12].
As future work, we intend to validate our methodology with other LBSN datasets and other data about gender preferences for venues collected in a traditional (offline) fashion.
Offline recruitment took place at various gay venues frequented by YGBM and by placing advertisements promoting the survey website in gay-related media aimed at YGBM.
However, the studies are limited because offline sampling misses MSM who do not go to these venues due to fear of discrimination, and some HIV-positive MSM who are at high risk for transmission of HIV or STDs may not go to these places either.
Second, this study assumes that the sample of MSM recruited online is representative of those MSM who met sexual partners online, and it also assumes that the sample of MSM recruited offline is representative of those MSM who met sexual partners at gay venues.
Equally, we are not able to estimate a response rate for those recruited offline (eg. in a sexual health clinic or in a commercial venue) since we do not know how many people saw the posters or picked up postcards advertising the project in the different locations.
