My training at a consultancy company, first job out of college, was like this but actually legit. Nice hotel with a free breakfast, transportation to their facility, and actual (paid) training on a few things, lasting a month. At the end I was put on a client to work for. Pretty good salary for a first job too.
So if a company offers this stuff, it's not necessarily a red flag, just do some research on them. It can be a great springboard if you don't have any better offers.