Teams are doing more and more of this stuff. Here is what the NY Mets do for their offseason "fan fest." Its a paid event, too. But look at what you get...panels...autograph sessions, etc. And current and former players attend, including many many of the "legends." A few friends of mine down here have gone and say it was well worth it. 
 
	 
 
	https://www.mlb.com/mets/fans/amazin-day