The first one of these homestands is against divisional rivals; I'd expect a fair number of Reds fans in for the four-game set, even though it's weekdays.
I'm including the three-game series against the Astros -- now an interleague rival -- in this post because it's an entire "homestand" by itself, surrounded by a seven-game trip before it and a nine-game trip after it. After the Houston series, the next home game isn't until July 5.
Dates and times:
Pirates: June 7 (1:20), May 30 (3:05), June 9 (1:20)
Reds: June 10 (7:05), June 11 (7:05), June 12 (1:20), June 13 (1:20)
Astros: June 21 (1:20), June 22 (3:05), June 23 (1:20)
As always, face value only for tickets. If comments to this post are closed, email me and I'll reopen them.